Early signs of oral cancer: 8 recognizable symptoms

Oral cavity cancer is one of the dangerous head and neck cancers, but it is often detected late because the initial symptoms are quite similar to common dental problems. According to statistics, the 5-year survival rate for patients can be over 80% if oral cancer is detected in its early stages. However, when cancer cells have spread to other organs, the chances of successful treatment significantly decrease.

What's concerning is that many people often ignore signs of oral cavity cancer such as slow-healing sores, burning pain in the mouth, difficulty swallowing, or the appearance of abnormal patches on the tongue and oral mucosa. This complacency allows the disease to silently progress for a long time without timely detection.

In this article, you will learn to recognize early symptoms of oral cavity cancer, understand important warning signs, and know when to seek medical attention to protect your health and that of your loved ones.

Part 1: How to self-check for signs of oral cancer visually

Symptom 1: Signs of oral cancer when self-checking

Regular monthly oral cavity check-ups

Many cases of oral cavity cancer and oral cancer show abnormal signs even in the early stages. However, there are also many patients who do not experience clear symptoms until the disease has progressed further. Therefore, experts recommend self-checking the oral cavity at least once a month in addition to regular dental check-ups.

When self-checking, stand in front of a mirror and carefully observe your entire mouth to detect early signs of oral cavity cancer such as:

• Slow-healing sores.
• Abnormal white or red patches.
• Lumps or swollen areas in the mouth.
• Unexplained bleeding.
• Changes in the color of the oral mucosa.

Observe all at-risk areas

Cancer cells can develop in various areas within the oral cavity and throat. During your check, pay attention to observing:

• Lips.
• Gums.
• Tongue and underside of the tongue.
• Hard palate.
• Soft palate.
• Inside of the cheeks.
• Tonsils and the back of the throat.

These are all locations where oral cancer symptoms often appear but are easily missed if not carefully checked.

Use a dental mirror for clearer observation

Some areas inside the mouth are difficult to see with a regular mirror. If possible, you should use a handheld dental mirror or ask your dentist for guidance on how to check properly.

Careful observation of hidden areas increases the chances of early detection of early signs of oral cancer, thereby allowing for proactive examination and timely treatment.

Clean your mouth before checking

Before self-checking your oral cavity, make sure to:

1. Brush your teeth thoroughly.
2. Floss to remove food debris.
3. Rinse your mouth well with clean water.

If your gums often bleed after brushing or flossing, rinse with warm salt water and wait a few minutes before observing. This helps you avoid confusing temporary irritation with oral abnormalities that need to be monitored.

Note any abnormal changes

During your self-check, pay attention to any changes that last longer than 2 weeks, such as:

• Sores that don't heal.
• Persistent pain or burning.
• Difficulty chewing or swallowing.
• Changes in the color of the tongue or oral mucosa.
• Appearance of lumps or abnormal thickened areas.

If you notice any of these signs, you should visit a medical facility or a dental specialist for an early examination. Early detection of oral cavity cancer is a crucial factor in improving treatment effectiveness and prognosis.

Symptom 2: Signs of oral cancer through abnormal white spots

Check for white patches or white sores in the mouth

One of the easily noticeable signs of oral cavity cancer is the appearance of white patches or white lesions on the oral mucosa. In medicine, this condition is called leukoplakia and is considered a precancerous lesion that needs careful monitoring.

When self-checking your oral cavity, pay attention to observing:

• The inside of the cheeks.
• Gums.
• Tongue and underside of the tongue.
• Palate.
• Lips and other mucosal areas.

If you detect abnormal white spots or patches that persist, you should not be complacent.

Differentiating leukoplakia from common canker sores

Many people confuse leukoplakia with canker sores or small ulcers caused by biting the cheek, eating hot food, or mucosal damage.

Some common differences include:

• Canker sores often cause noticeable pain and burning.
• Leukoplakia usually does not cause pain in the early stages.
• Canker sores tend to heal spontaneously after about 7–14 days.
• Leukoplakia often persists and does not disappear on its own.

Because it causes little discomfort, many cases of early-stage oral cancer are easily overlooked.

Note diseases with similar symptoms

Not all white patches in the mouth are cancer. Some other conditions can also cause similar symptoms such as:

• Oral thrush.
• Gingivitis or tonsillitis.
• Oral infections.
• Mucosal irritation from sharp teeth or dental restorations.

However, if the lesion persists or shows abnormal signs, a specialist examination is necessary to determine the exact cause.

Monitor the duration of the lesion

The duration of a white lesion is an important factor in recognizing the risk of serious disease.

You should pay special attention when:

• The white patch persists for more than 2 weeks.
• Its size is increasing.
• The surface becomes thicker or rougher.
• Pain, bleeding, or discomfort appears when eating or drinking.
• Accompanied by difficulty swallowing or moving the tongue.

These symptoms may be related to early signs of oral cavity cancer and should be evaluated by a doctor as soon as possible.

Seek medical attention proactively when abnormalities are detected

Any white patch, sore, or lesion in the mouth that does not heal after 2 weeks should not be ignored. Early examination helps detect precancerous lesions or oral cancer symptoms from the early stages, thereby improving treatment effectiveness and reducing the risk of complications.

Symptom 3: Red spots in the mouth can be a sign of cancer

Pay attention to abnormal red patches or red sores

In addition to white patches, the appearance of persistent red patches or red sores in the oral cavity is also one of the signs of oral cavity cancer that should not be overlooked. In medicine, these lesions are called erythroplakia.

Although less common than leukoplakia, erythroplakia has a higher risk of developing into cancer. Therefore, early detection of these abnormalities is very important for oral health and the potential for disease treatment.

Thoroughly check areas prone to lesions

When self-checking your mouth, carefully observe the following areas:

• The inside of the cheeks.
• Gums.
• Tongue and under the tongue.
• Palate.
• The back wall of the throat.
• Floor of the mouth.

If you detect persistent red patches or discolored mucosal areas, you should monitor them closely and consider seeking specialist medical attention.

Differentiating erythroplakia from canker sores and common lesions

Many people easily confuse erythroplakia with benign oral problems. However, some characteristics below can help identify the difference:

• Canker sores usually begin as a red area, then form an ulcer with a white or yellow center.
• Erythroplakia typically maintains its red color and does not disappear on its own.
• Canker sores usually heal within 1–2 weeks.
• Erythroplakia can persist for many weeks.

This is why persistent red patches are often considered a sign that requires medical examination.

Do not confuse with irritation or viral infections

Some other conditions can also cause red lesions in the mouth, such as:

• Irritation from excessively spicy or acidic food.
• Scratches on the oral mucosa.
• Blisters from the herpes virus.
• Gingivitis or stomatitis.

However, these benign lesions usually improve quickly after the cause of irritation is removed or appropriate treatment is given.

Monitor for dangerous warning signs

You should pay special attention if the red patch or red sore has the following characteristics:

• Lasts longer than 2 weeks.
• Shows no signs of healing.
• Its size is increasing.
• Bleeds easily when touched.
• Causes discomfort when eating or swallowing.
• Appears with a lump or abnormal thickened area in the mouth.

These could be symptoms of oral cancer or precancerous lesions that need to be evaluated by a specialist.

Seek early examination for timely disease detection

If you notice any red patch or red sore in your mouth that does not disappear after 2 weeks, you should proactively visit a medical facility for examination. Early detection of early-stage oral cavity cancer helps increase treatment effectiveness, limit the risk of disease progression, and significantly improve the long-term prognosis.

Symptom 4: Beware of lumps and rough mucosal areas

Check for abnormal lumps in the oral cavity

One of the common signs of oral cavity cancer is the appearance of abnormal lumps, swollen areas, or thickened tissue inside the mouth. When cells grow uncontrollably, they can form abnormal tissue masses that a patient can feel with their tongue or by touch.

During self-examination, pay attention to whether there is:

• Small lumps or unusual bumps.
• Persistent swelling of unknown cause.
• Thickened tissue at a fixed location.
• A feeling of foreign body or obstruction in the mouth.

In the early stages, these lumps usually do not cause pain, so they are easily overlooked.

Use your tongue to feel for abnormal changes

Not all lesions are visible to the naked eye. Therefore, you should gently run your tongue over your entire oral cavity to detect:

• Rough mucosal areas.
• Unusual bumpy areas.
• Raised or harder spots compared to the surrounding tissue.
• Areas that feel unusual to the touch.

These can be early symptoms of oral cancer that many people often ignore.

Note when dentures become difficult to use

For people wearing dentures, a noteworthy sign is the feeling that the dentures suddenly become loose or no longer fit as before.

This can happen when:

• Soft tissue in the mouth thickens abnormally.
• A new lump or swollen area appears.
• The tissue structure in the oral cavity changes.

If this condition persists without an obvious cause, you should seek medical attention for an accurate assessment.

Differentiating from other benign causes

Not all lumps or rough areas in the mouth are related to cancer. Some other common causes include:

• Gingivitis.
• Irritation from dentures.
• Lesions from biting the oral mucosa.
• Persistent dry mouth.
• Oral thrush.
• Habit of chewing or holding tobacco.

However, self-differentiation with the naked eye is often very difficult. Therefore, persistent abnormalities always need careful monitoring.

Pay special attention when the lesion grows larger

The risk of serious illness increases if you notice:

• The lump continues to grow over time.
• The rough area spreads to other areas.
• Oral tissue becomes thicker and harder.
• Persistent bleeding or pain appears.
• Difficulty chewing, swallowing, or speaking.

These are symptoms that may be related to oral cancer or precancerous lesions that need to be checked early.

Seek medical attention if abnormalities persist for more than 2–3 weeks

Any lump, thickened tissue area, or rough mucosal patch in the mouth that does not disappear after 2–3 weeks needs to be evaluated by a specialist.

Early detection of signs of oral cavity cancer helps increase the effectiveness of treatment, limit the risk of disease progression, and protect long-term health.

Symptom 5: Persistent mouth pain can be a warning sign

Do not be complacent with persistent pain or discomfort in the mouth

Mouth pain is a fairly common symptom and is often related to common dental problems. However, in some cases, it can also be one of the signs of oral cavity cancer that needs attention, especially when the pain is persistent or increasingly severe.

If the pain does not improve despite good oral hygiene or treatment for common diseases, you should consider seeking specialist medical attention to find the exact cause.

Differentiating pain from dental disease and abnormal signs

Most mouth pains stem from benign causes such as:

• Tooth decay.
• Gingivitis or periodontitis.
• Wisdom teeth eruption.
• Canker sores.
• Sore throat.
• Irritation from dental restorations or dentures.

These conditions usually have clear causes and can improve after proper treatment.

Conversely, oral cancer symptoms often develop insidiously and persist for longer.

Pay special attention to persistent dull pain

Pain related to oral cavity cancer usually does not appear suddenly. Instead, the patient may experience:

• Dull pain lasting for many weeks.
• A constant burning or uncomfortable sensation.
• Pain gradually increasing over time.
• Pain when chewing, swallowing, or speaking.

These are signs that should not be taken lightly, especially when no clear cause can be found from the teeth or gums.

Beware when pain spreads to the jaw and neck

Another worrying sign is when the pain spreads to adjacent areas.

You should seek early medical attention if you experience:

• Pain spreading down to the lower jaw.
• Persistent neck pain.
• Swollen lymph nodes in the neck or under the jaw.
• Feeling of tightness around the throat.

The combination of persistent pain and swollen lymph nodes may be related to serious conditions that require specialized evaluation.

Do not ignore numbness or decreased sensation

In addition to pain, some people with early-stage oral cancer also experience:

• Persistent lip numbness.
• Tongue numbness or numbness in an area of the oral cavity.
• Decreased sensation in the throat.
• Unusual unexplained tingling sensations.

These symptoms can appear gradually, making them easy to confuse with common neurological or dental problems.

Monitor symptoms lasting over 2 weeks

You should proactively seek medical attention if you experience one or more of the following signs:

• Mouth pain lasting over 2 weeks.
• Non-healing sores.
• Increasing pain.
• Presence of an unusual lump or swollen area.
• Persistent lip, tongue, or throat numbness.
• Swollen lymph nodes in the neck or under the jaw.

Early recognition of oral cavity cancer signs helps increase the likelihood of detecting the disease in its early stages, thereby improving treatment effectiveness and quality of life.

Part 2: Oral cavity cancer symptoms: Painful swallowing, tongue numbness

Symptom 1: Difficulty chewing can be a sign of oral cancer

Do not ignore persistent difficulty chewing

Difficulty chewing is one of the signs of oral cavity cancer often mistaken for common dental problems. As lesions in the mouth grow larger, they can affect the function of the jaw, tongue, and soft tissues, making eating more difficult.

If difficulty chewing persists or worsens, you should monitor it carefully and seek medical advice.

Pay attention when jaw or tongue movement becomes difficult

Lesions caused by oral cancer can reduce the flexibility of the oral cavity, leading to symptoms such as:

• Difficulty opening or closing the mouth completely.
• Feeling of jaw stiffness when eating.
• Difficulty moving the tongue as usual.
• Pain or discomfort when chewing food.
• Increased difficulty speaking.

These changes often appear gradually, so many people do not notice them immediately.

Be wary of unusual loose teeth

In adults, healthy teeth suddenly becoming loose or shifting position can be a noteworthy sign.

You should see a doctor if you notice:

• Unexplained loose teeth.
• Unusual changes in the space between teeth.
• Teeth showing signs of tilting or misalignment.
• Changes in bite compared to before.

In some cases, the growth of a tumor in the oral cavity can affect the supporting tissues of the teeth and cause these changes.

Do not completely blame dentures

Many older adults believe that difficulty chewing is simply due to ill-fitting dentures. However, if previously well-functioning dentures suddenly cause discomfort, the cause may not solely lie with the dentures.

Pay attention if any of the following occur:

• Dentures become loose.
• Feeling of pressure or pain when wearing them.
• Difficulty chewing even after adjusting dentures.
• Presence of swelling or thickened tissue under the dentures.

These could be changes in the oral cavity structure that require closer examination.

Frequently biting the cheek or tongue while eating

Some people with early-stage oral cavity cancer may experience:

• Easily biting the inside of the cheek.
• Biting the tongue when chewing.
• Unusual changes in oral cavity sensation.
• Food is not chewed evenly as before.

The cause could be abnormal tissue masses that alter how the jaw and tongue function during eating.

Seek medical attention if symptoms persist or worsen

You should proactively seek medical attention if you experience any of the following signs:

• Difficulty chewing lasting over 2 weeks.
• Difficulty moving the jaw or tongue.
• Unusual loose teeth.
• Frequently biting the cheek or tongue.
• Presence of a lump, sore, or swollen area in the mouth.

Early detection of oral cancer symptoms helps increase the likelihood of effective treatment, minimize complications, and preserve chewing function and long-term quality of life.

Symptom 2: Persistent difficulty swallowing is a worrisome sign

Pay attention when swallowing becomes more difficult than usual

Difficulty swallowing is one of the common signs of oral cavity cancer and throat cancer, but it is often overlooked. Initially, many people only feel a slight obstruction when eating. However, as the disease progresses, this condition can become more severe and significantly affect daily activities.

If swallowing food becomes increasingly difficult without a clear cause, you should closely monitor accompanying symptoms.

Recognize common symptoms of difficulty swallowing

Patients may experience one or more of the following symptoms:

• Feeling of food getting stuck in the throat.
• Painful or uncomfortable swallowing.
• Having to swallow multiple times for food to go down.
• Eating slower than usual.
• Easily choking while eating.

These symptoms can be related to abnormalities in the oral cavity, throat, or esophagus.

Difficulty swallowing can progress from solids to liquids

In the early stages, patients often only experience difficulty swallowing solid or hard foods. As the condition becomes more severe, swallowing can affect:

• Soft foods.
• Drinks.
• Saliva.

This progression is a sign that medical attention should be sought as soon as possible to determine the cause.

Feeling of something stuck in the throat

A fairly common symptom in people with oral cancer or throat cancer is the sensation of something stuck in the throat, even if there is no actual foreign object.

Patients often describe:

• A constant feeling of obstruction in the throat.
• Frequent urge to clear the throat or swallow.
• A persistent mild choking sensation.
• Discomfort when eating or speaking.

If this condition lasts for many weeks, you should not be complacent.

Persistent throat numbness or sore throat should be noted

In addition to difficulty swallowing, some people also experience:

• Numbness or decreased sensation in the throat.
• Persistent sore throat.
• Frequent burning sensation in the throat.
• Discomfort every time food or drink is swallowed.

These symptoms can appear when lesions develop in the throat, tonsils, or back of the tongue.

Higher risk when lesions appear on the tonsils or tongue

Tumors located in the:

• Tonsils.
• Base of the tongue.
• Posterior pharyngeal wall.

Can obstruct the swallowing process and cause a more pronounced sensation of pain or choking. These are locations that are often difficult to observe with the naked eye, making them easily detected late.

When to see a doctor?

You should proactively seek medical attention if you experience any of the following signs:

• Difficulty swallowing lasting over 2 weeks.
• Sensation of choking or a foreign body in the throat.
• Pain when swallowing.
• Persistent throat numbness.
• Hoarseness or unexplained sore throat.
• Weight loss due to difficulty eating.

Early detection of oral cavity cancer symptoms and throat cancer increases the likelihood of successful treatment, reduces complications, and improves long-term quality of life.

Symptom 3: Voice changes can be a sign of cancer

Listen for unusual changes in your voice

Persistent voice changes are one of the signs of oral cavity cancer and throat cancer that many people often overlook. When lesions affect the tongue, jaw, throat, or vocal cords, the ability to articulate and the quality of the voice can change significantly.

If you notice an unusual voice for a long time that is not related to a cold or sore throat, pay special attention.

Unexplained persistent hoarseness

Hoarseness is a common symptom when lesions appear near the vocal cords or throat area.

You should monitor if you experience:

• Voice becoming hoarser than usual.
• Voice sounding weak or muffled.
• Easily running out of breath when speaking quickly.
• Hoarseness lasting over 2 weeks.

This can be a warning sign of head and neck conditions, including oral cancer and throat cancer.

Difficulty articulating or speaking unnaturally

When a tumor affects the function of the tongue or jaw, patients may experience difficulty with articulation.

Some common symptoms include:

• Unusual slurred speech.
• Unclear pronunciation.
• Difficulty controlling the tongue when speaking.
• Feeling of jaw stiffness or fatigue when communicating.

These changes often occur gradually, so patients sometimes do not notice them themselves.

Pay attention when others notice your voice changing

In many cases, family or friends are the first to notice changes in voice before the patient themselves realizes it.

If you are often told that:

• Your voice is different from before.
• You speak softer than usual.
• Your voice is hoarse or heavy.
• Your pronunciation has noticeably changed.

You should monitor closely and consider getting a health check-up.

Frequent throat clearing or feeling of something stuck in the throat

Many people with early-stage oral cavity cancer or throat cancer feel like there is something stuck in their throat.

This can lead to:

• Constant throat clearing.
• Frequent urge to clear the throat.
• Persistent mild cough.
• Feeling of obstruction or choking even without a foreign body.

If this symptom persists for a long time, it could be an abnormal sign that needs medical evaluation.

Voice changes due to affected airway

As the tumor grows larger, the airway or structures involved in vocalization can be compressed, causing:

• Pronounced voice changes.
• Unusual vocal timbre.
• Difficulty speaking for a long time.
• Feeling of shortness of breath when communicating.

These symptoms usually appear in advanced stages of the disease and require medical attention as soon as possible.

When to see a doctor?

You should proactively seek medical attention if any of the following signs appear:

• Hoarseness lasting over 2 weeks.
• Sudden voice changes without a clear cause.
• Difficulty articulating or speaking.
• Constant throat clearing.
• Feeling of something stuck in the throat.
• Accompanied by difficulty swallowing, sore throat, or swollen lymph nodes in the neck.

Early recognition of oral cancer symptoms and throat cancer helps increase the likelihood of detecting the disease in its early stages, thereby improving treatment effectiveness and long-term prognosis.

Part 3: Where to get an oral cancer screening and when to go?

Note 1: When to see a doctor?

Proactively seek medical attention if symptoms persist

Many oral issues can improve on their own after a short time. However, if oral cancer signs persist for more than 2 weeks or worsen, you should seek medical attention early for examination.

It is especially important to note when symptoms such as:

• Non-healing sores.
• Unusual white or red patches.
• Lumps in the mouth.
• Persistent mouth pain.
• Difficulty chewing or swallowing.
• Unexplained hoarseness.
• Persistent swollen neck lymph nodes.

Early examination helps accurately identify the cause and avoids missing the most effective treatment stage.

A dentist is often a suitable choice for an initial check-up

In many cases, a dentist may be the first to detect abnormalities related to oral cancer or precancerous lesions.

A dentist will help:

• Examine the entire oral cavity.
• Evaluate unusual sores or lumps.
• Rule out common dental problems.
• Refer to a specialist if necessary.

If serious lesions are suspected, you may be referred to an ENT specialist or oncologist for more in-depth tests.

The examination process often includes many related areas

In addition to examining the mouth, the doctor may also evaluate adjacent areas to find the cause of the symptoms.

Areas typically examined include:

• Lips.
• Gums.
• Tongue.
• Inside of the cheeks.
• Tonsils.
• Throat.
• Neck.
• Ears.
• Nose.

A comprehensive evaluation helps detect lesions that may have spread to other areas of the head and neck.

The doctor will ask about risk factors

During the examination, you may be asked about:

• Smoking habits.
• Frequent alcohol consumption.
• Family history of illness.
• Current symptoms.
• Duration and progression of symptoms.

This information helps the doctor assess the risk of oral cavity cancer and choose the appropriate course of examination.

Those who need special attention

Although the disease can occur at various ages, the risk is generally higher in people:

• Over 40 years old.
• Who smoke or use tobacco in any form.
• Who consume large amounts of alcohol for a long time.
• With a family history of head and neck cancer.
• Who are frequently exposed to cancer-causing risk factors.

However, even young people or those without obvious risk factors can still develop the disease, so do not be complacent if unusual signs appear.

Early detection helps improve treatment effectiveness

Most cases of early-stage oral cancer have a significantly better treatment prognosis than when the disease has spread. Therefore, if you notice any unusual changes in your oral cavity that last for more than 2 weeks, proactively seek medical attention instead of waiting for the symptoms to disappear on their own.

Proactive examination and early detection are crucial factors in protecting health, reducing complications, and improving long-term quality of life.

Note 2: Dye staining test to detect oral cancer

Ask your doctor about specialized screening methods

If you are in a high-risk group or experience persistent signs of oral cancer, your doctor may recommend several methods to help detect abnormal lesions in the oral cavity. These techniques help to observe suspicious mucosal areas more clearly that are difficult for the naked eye to accurately assess.

Early screening can help detect abnormal changes before the disease progresses more seriously.

Oral dye staining to detect suspicious areas

One commonly used supportive technique is staining the oral mucosa with a specialized dye such as toluidine blue.

This procedure works on the principle that:

• The dye is applied to the mucosal area to be examined.
• Abnormal cells tend to absorb the dye more strongly.
• Suspicious areas may appear darker blue compared to the surrounding healthy tissue.

This allows the doctor to identify areas that need to be monitored or undergo further specialized tests.

Dye staining results are not a final diagnosis

Although useful in the screening process, dye staining cannot definitively confirm whether a person has oral cancer.

Other conditions can also cause tissue to absorb more dye, such as:

• Wounds in the oral cavity.
• Lesions from biting the mucosa.
• Local inflammation.
• Prolonged irritation.

Therefore, dye staining results are only indicative and support an initial assessment.

Biopsy is the most accurate method for diagnosis

When a suspicious lesion is found, the doctor may order a biopsy to determine the nature of the cells.

This procedure typically includes:

1. Taking a small tissue sample from the abnormal area.
2. Sending the sample to a pathology laboratory.
3. Observing the cells under a microscope.
4. Assessing for the presence of cancer cells.

This is considered an important standard for accurately diagnosing oral cancer.

When should specialized tests be considered?

You should consult your doctor if you experience conditions such as:

• Ulcers that last for more than 2 weeks.
• Abnormal white or red patches.
• Lumps in the mouth.
• Unexplained mouth pain.
• Prolonged difficulty chewing or swallowing.
• Persistent hoarseness.
• Swollen lymph nodes in the neck.

These symptoms may be related to oral cancer symptoms and require thorough evaluation.

Early detection helps increase the chance of successful treatment

Screening methods such as mucosal staining combined with biopsy can help detect the disease at an earlier stage. This is a crucial factor in improving treatment effectiveness, reducing the risk of complications, and improving the prognosis for individuals with oral cancer.

Note 3: Light technology to assist in oral cancer detection

Discuss light examination methods with your doctor

In addition to regular clinical examinations, many medical facilities now use specialized light technologies to aid in the early detection of signs of oral cancer. These techniques help doctors identify abnormal mucosal areas that may be difficult for the naked eye to observe.

This is a supportive screening method, especially useful for individuals at high risk or experiencing suspicious symptoms.

Examine lesions with laser technology

Some devices use lasers or special light sources to assess differences between healthy and abnormal tissue in the oral cavity.

The operating principle includes:

• Shining light on the mucosal area to be examined.
• Observing how the tissue reflects light.
• Comparing differences between normal and suspicious areas.

Typically, abnormal tissues may reflect light differently from healthy tissues, helping the doctor identify areas that need closer evaluation.

Fluorescence light screening

Another technique uses fluorescence light combined with a dilute acetic acid solution.

The procedure typically involves:

1. Rinsing the mouth with a specialized solution.
2. Shining fluorescence light into the oral cavity.
3. Observing changes in tissue color or luminosity.

Areas with abnormal signs may appear clearer under specialized light, assisting in the detection of early-stage oral cancer.

Light methods do not replace formal diagnosis

Although valuable in detecting suspicious lesions, techniques using lasers or fluorescence light cannot definitively confirm whether a person has cancer.

The results only help to:

• Identify areas that need monitoring.
• Assist in selecting sample collection sites for testing.
• Early detection of abnormal changes in the oral mucosa.

For an accurate diagnosis, the patient still needs to undergo specialized tests as prescribed by the doctor.

Biopsy is an important standard for disease determination

When a suspicious area is detected, the doctor may order a biopsy to examine the nature of the lesion.

This process includes:

• Taking a small tissue sample from the abnormal area.
• Sending it to a pathology laboratory.
• Analyzing the cells under a microscope.
• Determining the presence or absence of cancer cells.

This is the most reliable method for diagnosing oral cancer.

Exfoliative cytology testing can be performed

In some cases, the doctor may use a method of collecting surface cells from the lesion with a specialized brush.

This technique is typically performed by:

• Gently brushing the suspicious area.
• Collecting the exfoliated cells.
• Observing the sample under a microscope.

This method helps to provide a preliminary assessment of the cellular status and assists in deciding whether a biopsy is needed.

Early detection helps improve treatment effectiveness

If you notice oral cancer symptoms such as persistent ulcers, white patches, red patches, abnormal lumps, difficulty swallowing, or prolonged hoarseness, seek early medical attention. Combining clinical examination with modern supportive technologies can help detect the disease at an early stage, facilitating the treatment and recovery process.

How to reduce the risk of oral cancer

Regular oral check-ups for early detection

Regular dental check-ups are one of the effective ways to detect early signs of oral cancer. Many precancerous lesions or abnormalities in the oral cavity can be identified at an early stage before clear symptoms appear.

You should:

• Have regular dental check-ups as recommended by your dentist.
• Proactively examine your oral cavity at home every month.
• Inform your doctor if you detect any abnormal changes.

Limit alcohol and avoid tobacco use

Tobacco and alcohol are two of the leading risk factors associated with oral cancer and head and neck cancer.

To reduce your risk of developing the disease, you should:

• Stop smoking.
• Avoid e-cigarettes and chewing tobacco.
• Limit or stop alcohol consumption.
• Avoid combining smoking and drinking alcohol regularly.

Changing these habits not only helps reduce cancer risk but also improves overall health.

Men need to pay special attention to warning signs

Statistics show that oral cancer occurs more often in men than in women. Therefore, men, especially those with prolonged smoking or alcohol consumption habits, should proactively monitor for abnormal symptoms in the oral cavity and undergo regular health check-ups.

Understand oral cancer treatment methods

Once detected, the treatment method will depend on the tumor's location, size, and the disease stage.

Commonly applied treatment methods include:

• Surgical removal of the tumor.
• Radiation therapy.
• Chemotherapy.
• A combination of several treatment methods as prescribed by the doctor.

Early detection of the disease often helps increase treatment effectiveness and reduce the risk of complications.

Increase green vegetables and fruits in your diet

A healthy diet can contribute to reducing the risk of many types of cancer, including oral cancer.

You should prioritize:

• Fresh green vegetables.
• Fresh fruits.
• Cruciferous vegetables such as broccoli, kale, cabbage.
• Foods rich in antioxidants.
• Natural, minimally processed foods.

Maintaining a balanced diet also helps boost resistance and protect long-term health.

Do not ignore any abnormalities in the oral cavity

If you see or feel any abnormal changes in your mouth, do not wait too long hoping they will disappear on their own.

Be proactive in seeking medical attention if you experience:

• Persistent ulcers.
• Abnormal white or red patches.
• Lumps in the mouth.
• Unexplained mouth pain.
• Difficulty chewing or swallowing.
• Prolonged hoarseness.
• Unusual loose teeth.

In particular, any lesion that does not heal after 2 weeks should be checked by a doctor or dentist to rule out the risk of oral cancer symptoms.

Early detection is the key to protecting health

Most cases of early-stage oral cancer have a significantly higher chance of successful treatment compared to when the disease has progressed. Therefore, maintaining a healthy lifestyle, undergoing regular dental check-ups, and paying attention to signs of oral cancer are important steps to protect your health and that of your family.

References

1. American Cancer Society. (2025). Oral Cavity and Oropharyngeal Cancer. American Cancer Society.
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Content edited by: Sidney Bailey Hoang.

Information consulted and verified by expert: William Harris.