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Mouth Cancer Signs and Symptoms

Learn to recognise the signs and symptoms of mouth cancer early. Understand warning signals to ensure timely diagnosis and effective treatment.

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Written by Dr. J T Hema Pratima

Reviewed by Dr. Md Yusuf Shareef MBBS

Last updated on 9th Sep, 2025

Introduction

Your mouth is a window to your overall health. While we often notice a pesky canker sore or a sensitive tooth, some changes in the oral cavity can be signals of something more serious, like mouth cancer. Also known as oral cancer, this disease affects tens of thousands of people every year. The key to successful treatment and a positive outcome is early detection. Unfortunately, because the early signs of mouth cancer can be subtle and painless, they are frequently overlooked or mistaken for minor ailments. This article will guide you through the ten critical symptoms you should never ignore, helping you distinguish between common irritations and potential warning signs. Knowing what to look for could save your life. We’ll also cover the risk factors, prevention tips, and the crucial steps to take if you notice any of these changes.

What is Mouth Cancer (Oral Cancer)?

Mouth cancer refers to cancer that develops in any part of the oral cavity, including the lips, gums, tongue, inner lining of the cheeks, roof, and floor of the mouth. Cancers that occur in the middle part of the throat (oropharynx), including the tonsils and base of the tongue, are often grouped under oral or oropharyngeal cancer.

Defining Oral Cavity and Oropharyngeal Cancers

The most common type of mouth cancer is squamous cell carcinoma, which makes up over 90% of cases. These cancerous cells originate in the flat, thin cells (squamous cells) that line the lips and the inside of the mouth. When identified early, while the cancer is still localised, the 5-year survival rate is significantly high, underscoring the vital importance of recognizing the early signs of oral cancer.

Consult a Head and Neck Oncologist for the best advice

Dr. Abhishek Budharapu, Head and Neck Surgical Oncologist

Dr. Abhishek Budharapu

Head and Neck Surgical Oncologist

11 Years • MDS, FHNS, FUICC(USA)

Hyderabad

Apollo Hospitals Jubilee Hills, Hyderabad

1000

1000

No Booking Fees

Dr. Rahul Buggaveeti, Head and Neck Surgical Oncologist

Dr. Rahul Buggaveeti

Head and Neck Surgical Oncologist

11 Years • MS(ENT), MCh(Head & neck surg. Onco.)

Hyderabad

Apollo Hospitals Jubilee Hills, Hyderabad

1000

No Booking Fees

Dr. Gopal Kumar, Head, Neck and Thyroid Cancer Surgeon

Dr. Gopal Kumar

Head, Neck and Thyroid Cancer Surgeon

15 Years • MBBS, MS , FARHNS ( Seoul, South Korea ), FGOLF ( MSKCC, New York )

Delhi

Apollo Hospitals Indraprastha, Delhi

recommendation

90%

(25+ Patients)

1500

2000

No Booking Fees

Dr. Praveen Kumar Garg, Surgical Oncologist

Dr. Praveen Kumar Garg

Surgical Oncologist

26 Years • MBBS, M.S.(Gen.Surg.), M.Ch.(OncoSurg.)

Delhi

Apollo Hospitals Indraprastha, Delhi

recommendation

94%

(50+ Patients)

1000

2000

No Booking Fees

Dr. Vishal Choksi, Head and Neck Surgical Oncologist

Dr. Vishal Choksi

Head and Neck Surgical Oncologist

20 Years • American Head & Neck Society (AHNS) certified from Memorial Sloan-Kettering Cancer Centre, American Board of Surgery (ABS) certified general surgeon, MBBS (India)

Ahmedabad

Apollo Hospitals Gandhinagar, Ahmedabad

4000

3000

No Booking Fees

The 10 Most Common Signs and Symptoms of Mouth Cancer

Being aware of these symptoms is the first step toward early detection. If you experience any of these for more than two weeks, it is essential to seek professional medical evaluation.

1. Sores That Don't Heal (The Most Common Sign)

A sore or ulcer inside your mouth or on your lip that does not heal is the most frequent early sign of oral cancer. Unlike common canker sores, which typically resolve within 10-14 days, a cancerous sore will persist, may bleed easily, and often has a raised border.

2. Persistent Mouth Pain or Earaches

Unexplained, persistent pain or discomfort in the mouth that doesn't go away is a significant warning sign. Sometimes, mouth cancer can cause referred pain, manifesting as an earache without any ear infection.

3. Unusual Lumps, Thickening, or Rough Spots

Feel for any lumps, bumps, or areas of thickened tissue on your lips, gums, cheeks, or elsewhere inside your mouth. A rough or crusty spot on the lip can also be a precursor to cancer.

4. Red or White Patches (Leukoplakia and Erythroplakia)

Patches inside your mouth are a major red flag.

  • Leukoplakia: White or grayish patches that can't be scraped off.

  • Erythroplakia: Red, velvety patches that are often more serious and have a higher potential to be cancerous.

While not all patches are malignant, they must be evaluated by a doctor.

5. Difficulty Chewing, Swallowing, or Moving Your Jaw

A tumour can interfere with the normal mechanics of your mouth and throat, causing difficulty swallowing (dysphagia), trouble moving your jaw, or a feeling that your teeth don't fit together properly anymore.

6. A Persistent Sore Throat or Feeling Something is Caught

A constant sore throat, hoarseness, or the persistent sensation that something is caught in the back of your throat are classic symptoms of throat cancer, which is often linked to oral cancers, especially those caused by HPV.

7. Numbness, Pain, or Tenderness

Numbness, loss of feeling, or tenderness in any area of your mouth, face, or neck can indicate that a tumour is affecting nerves.

8. Jaw Swelling and Denture Problems

Swelling of the jaw can cause dentures to fit poorly or become uncomfortable. If your dentures suddenly don't fit right, it's a reason to see your dentist or doctor, not just your denturist.

9. Hoarseness or Change in Voice

A lasting change in the sound of your voice or persistent hoarseness can be a sign of a growth affecting the vocal cords or surrounding areas in the throat.

10. Unexplained Weight Loss

Significant and unintended weight loss is a common symptom of many cancers, including mouth cancer, as eating can become difficult and painful.

Early Signs of Mouth Cancer vs. Common Mouth Problems

It's natural to worry, but many mouth issues are benign. Here’s how to tell the difference.

Is it Cancer or a Canker Sore?

Canker Sores (Aphthous Ulcers): Are painful, have a white or yellow centre with a red border, appear on movable parts inside the mouth (like the tongue or inner cheek), and heal completely within 1-2 weeks.

Cancerous Sores: Are often painless in the early stages, have a raised, hard border, can appear anywhere (including the floor of the mouth or gums), and persist for weeks.

When to See a Doctor: The Two-Week Rule

A good rule of thumb is the "two-week rule." If any sore, patch, lump, or hoarseness does not resolve on its own within 14 days, you must get it checked. If your condition does not improve after this period, consult a doctor for further evaluation. Early professional assessment is crucial.

What Are the Main Causes and Risk Factors?

Understanding what increases your risk can help you make informed lifestyle choices.

Tobacco Use: The #1 Risk Factor

This includes smoking cigarettes, cigars, pipes, and using chewing tobacco or snuff. Tobacco use is linked to about 85% of head and neck cancers.

Heavy Alcohol Consumption

People who drink heavily are more likely to develop oral cancer. The risk multiplies for those who both smoke and drink heavily.

Human Papillomavirus (HPV)

Infection with certain strains of HPV, particularly HPV16, is a rapidly growing cause of oropharyngeal cancers, which affect the tonsils and base of the tongue.

Other Risk Factors (Sun Exposure, Diet, Age)

Prolonged sun exposure increases the risk of lip cancer. A diet low in fruits and vegetables may also increase risk. Mouth cancer is also more common in people over 40 and in men.

How is Mouth Cancer Diagnosed?

Identifying mouth cancer early can save lives. Mouth Cancer Diagnosed by:

The Oral Cancer Screening Exam

This is a quick, painless visual and physical examination where a doctor or dentist looks for lumps, irregular tissues, or patches in your mouth, neck, and face. They may feel for any lumps in your neck and under your jaw.

Biopsy and Imaging Tests

If a suspicious area is found, the only definitive way to diagnose cancer is with a biopsy, where a small sample of tissue is removed for laboratory analysis. Apollo24|7 offers convenient home collection for biopsies and other tests, ensuring a seamless process from collection to diagnosis. Further imaging tests like CT, MRI, or PET scans may be used to determine the stage of the cancer.

Prevention: How to Reduce Your Risk

While not all cases are preventable, you can drastically lower your risk.

  • Quit Tobacco in All Forms: This is the single most important step.

  • Limit Alcohol Consumption: Drink in moderation, if at all.

  • Get Vaccinated Against HPV: The HPV vaccine can protect against the strains linked to oral cancer.

  • Protect Your Lips from the Sun: Use a lip balm with SPF and wear a wide-brimmed hat.

  • Maintain a Healthy Diet and Oral Hygiene: Eat a diet rich in fruits and vegetables and see your dentist regularly for check-ups, which include an oral cancer screening.

Conclusion: Your Health is in Your Hands

Your mouth tells a story, and listening to it is a critical part of maintaining your health. The signs of mouth cancer can be subtle, but knowing what to look for empowers you to take action. Regular self-examinations, checking your mouth in a mirror for any changes, combined with routine dental visits are your first line of defense. Remember the two-week rule: any persistent change warrants a professional opinion. Do not let fear or uncertainty delay you. Early detection transforms outcomes. If you have noticed any persistent symptoms or have significant risk factors, don't wait. Your proactive approach could make all the difference.

Consult a Head and Neck Oncologist for the best advice

Dr. Abhishek Budharapu, Head and Neck Surgical Oncologist

Dr. Abhishek Budharapu

Head and Neck Surgical Oncologist

11 Years • MDS, FHNS, FUICC(USA)

Hyderabad

Apollo Hospitals Jubilee Hills, Hyderabad

1000

1000

No Booking Fees

Dr. Rahul Buggaveeti, Head and Neck Surgical Oncologist

Dr. Rahul Buggaveeti

Head and Neck Surgical Oncologist

11 Years • MS(ENT), MCh(Head & neck surg. Onco.)

Hyderabad

Apollo Hospitals Jubilee Hills, Hyderabad

1000

No Booking Fees

Dr. Gopal Kumar, Head, Neck and Thyroid Cancer Surgeon

Dr. Gopal Kumar

Head, Neck and Thyroid Cancer Surgeon

15 Years • MBBS, MS , FARHNS ( Seoul, South Korea ), FGOLF ( MSKCC, New York )

Delhi

Apollo Hospitals Indraprastha, Delhi

recommendation

90%

(25+ Patients)

1500

2000

No Booking Fees

Dr. Praveen Kumar Garg, Surgical Oncologist

Dr. Praveen Kumar Garg

Surgical Oncologist

26 Years • MBBS, M.S.(Gen.Surg.), M.Ch.(OncoSurg.)

Delhi

Apollo Hospitals Indraprastha, Delhi

recommendation

94%

(50+ Patients)

1000

2000

No Booking Fees

Dr. Vishal Choksi, Head and Neck Surgical Oncologist

Dr. Vishal Choksi

Head and Neck Surgical Oncologist

20 Years • American Head & Neck Society (AHNS) certified from Memorial Sloan-Kettering Cancer Centre, American Board of Surgery (ABS) certified general surgeon, MBBS (India)

Ahmedabad

Apollo Hospitals Gandhinagar, Ahmedabad

4000

3000

No Booking Fees

Consult a Head and Neck Oncologist for the best advice

Dr. Abhishek Budharapu, Head and Neck Surgical Oncologist

Dr. Abhishek Budharapu

Head and Neck Surgical Oncologist

11 Years • MDS, FHNS, FUICC(USA)

Hyderabad

Apollo Hospitals Jubilee Hills, Hyderabad

1000

1000

No Booking Fees

Dr. Rahul Buggaveeti, Head and Neck Surgical Oncologist

Dr. Rahul Buggaveeti

Head and Neck Surgical Oncologist

11 Years • MS(ENT), MCh(Head & neck surg. Onco.)

Hyderabad

Apollo Hospitals Jubilee Hills, Hyderabad

1000

No Booking Fees

Dr. Gopal Kumar, Head, Neck and Thyroid Cancer Surgeon

Dr. Gopal Kumar

Head, Neck and Thyroid Cancer Surgeon

15 Years • MBBS, MS , FARHNS ( Seoul, South Korea ), FGOLF ( MSKCC, New York )

Delhi

Apollo Hospitals Indraprastha, Delhi

recommendation

90%

(25+ Patients)

1500

2000

No Booking Fees

Dr. Praveen Kumar Garg, Surgical Oncologist

Dr. Praveen Kumar Garg

Surgical Oncologist

26 Years • MBBS, M.S.(Gen.Surg.), M.Ch.(OncoSurg.)

Delhi

Apollo Hospitals Indraprastha, Delhi

recommendation

94%

(50+ Patients)

1000

2000

No Booking Fees

Dr. Vishal Choksi, Head and Neck Surgical Oncologist

Dr. Vishal Choksi

Head and Neck Surgical Oncologist

20 Years • American Head & Neck Society (AHNS) certified from Memorial Sloan-Kettering Cancer Centre, American Board of Surgery (ABS) certified general surgeon, MBBS (India)

Ahmedabad

Apollo Hospitals Gandhinagar, Ahmedabad

4000

3000

No Booking Fees

More articles from Mouth cancer

Frequently Asked Questions

1. What does the very beginning of mouth cancer look like?

 It often starts as a small, pale, red, or dark lump or patch inside the mouth that is smooth or rough. It may look like a simple ulcer or a common canker sore but, crucially, it does not go away.

2. Is mouth cancer painful in the early stages?

Not always. One of the challenges of early detection is that early signs of oral cancer can be completely painless. This is why visual checks are so important, as you can't rely on pain alone as an indicator.

3. How can I check for mouth cancer at home?

In a well-lit room, use a mirror to look at and feel the inside of your lips, front and sides of your gums, roof and floor of your mouth, cheeks, and tongue (top, bottom, and sides). Feel for lumps, look for colour changes, and note any sores.

4. Who is most at risk for developing oral cancer?

The traditional high-risk group includes people over 40, men, and heavy users of tobacco and alcohol. However, cases are rising among younger, non-smoking individuals due to HPV and throat cancer, making awareness important for everyone.

5. Are all white patches in the mouth a sign of cancer?

No. Many white patches are benign conditions like linea alba (a white line on the cheek) or frictional keratosis from rubbing. However, any persistent white or red patch that cannot be wiped away should be professionally evaluated to rule out leukoplakia or erythroplakia.