CION Ameerpet
Medically reviewed by Dr. Muralidhar Muddusetty, Surgical Oncologist · Last reviewed June 2026
Most mouth ulcers are harmless and heal within two weeks. The one rule worth remembering: a sore, patch, or lump that does not heal in three weeks needs a doctor's eyes. A simple check can put your mind at rest — or catch something early, when it is most treatable.
A mouth ulcer — also called a canker sore or aphthous ulcer — is a small, shallow break in the lining of the mouth. It is usually round, has a grey-white centre with a red rim, and is painful. It comes from a cheek bite, sharp tooth, hot food, stress, or a minor infection, and it heals on its own within one to two weeks.
Oral cancer is an abnormal growth of cells in the mouth — the tongue, inner cheek, gums, floor of the mouth, or lips. It may show up as a sore that will not heal, a hard lump, a white patch (leukoplakia), or a red patch (erythroplakia). Crucially, it is often without pain in the early stage, which is why it is easy to ignore.
The honest truth: in the first days, a stubborn ulcer and an early cancer can look similar. You cannot reliably tell them apart by appearance alone — and that is exactly why duration matters more than looks.
India accounts for roughly one-third of the world's oral cancer cases, largely driven by tobacco, gutka, and areca-nut (supari) use. When oral cancer is found early, the 1-year survival rate at CION is 80.0% vs 71.6% nationally*. The single biggest factor in that gap is how early the sore is checked. (*1-year survival. Source: ICMR / NCRP.)
No single sign is proof either way. Look at the whole picture — and if anything in the right-hand column sounds familiar, get it reviewed.
| What to look at | Usually a harmless mouth ulcer | Could be oral cancer — get checked |
|---|---|---|
| How long it lasts | Heals within 1–2 weeks | Still there after 3 weeks or more |
| Pain | Usually painful | Often without pain, especially early |
| Edges | Smooth, round, well-defined | Irregular, raised, or hardened |
| Surface & colour | Grey-white centre, red rim | White or red patch that won't rub off |
| Bleeding | Rarely bleeds | Bleeds easily on touch |
| Lump or numbness | No lump, no numbness | Hard lump, thickening, or numbness |
| Risk background | Any healthy person occasionally | Tobacco, gutka, supari, or alcohol use |
This table is for guidance only and is not a diagnosis. When in doubt, a quick clinical look is always safer than waiting.
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Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
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Speak to our team about your mouth sore. We walk this journey with you — no rushed decisions, no unnecessary tests.
A check is quick, comfortable for most, and the only sure way to know how oral cancer is diagnosed. Here is the path we follow at CION.
The doctor asks when the sore appeared, whether it is healing, and about tobacco, gutka, supari, and alcohol use. Duration is the first and most important clue.
The specialist looks at and gently feels the sore, the tongue, the cheeks, and the lymph nodes in the neck — checking for hardness, raised edges, white or red patches, and any lump.
If the tissue looks suspicious, a tiny sample is taken and read by a pathologist. This is the one test that gives a definite answer. We do not order it unless the examination calls for it.
If it is a harmless ulcer, you are reassured and advised on care. If treatment is needed, a tumour board — not a single doctor — agrees the plan, with transparent costs explained upfront.
The 3-week rule — any sore, ulcer, white patch, or red patch in the mouth that has not healed in three weeks should be examined. This single rule catches most oral cancers early.
A lump or thickening — a hard area in the mouth, tongue, or neck, even without pain, is worth a review.
Bleeding, numbness, or trouble swallowing — these alongside a long-lasting sore are reasons to come in sooner rather than later.
If you use tobacco, gutka, supari, or alcohol, treat any of the above with extra care. You deserve a clear answer — and the earlier it is checked, the easier it usually is to treat.
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Start Your Story. Book Free Consultation.A common mouth ulcer is usually round, painful, has a clean grey-white centre, and heals on its own within two weeks. An oral cancer sore is often without pain at first, has irregular or raised edges, may bleed easily, and does not heal in three weeks or more. Pain is a poor guide — many early cancers do not hurt. The most reliable warning sign is duration: any sore, patch, or lump that lasts longer than three weeks should be reviewed by a doctor.
Most ordinary mouth ulcers heal within 7 to 14 days. If a sore in the mouth has not started to improve after two weeks, or is still present at three weeks, it is no longer behaving like a simple ulcer and should be examined. This is the single most useful rule for telling a harmless ulcer from something that needs investigation. You do not need to wait for pain, bleeding, or a lump before getting it checked.
A single short-lived mouth ulcer from a bite or hot food does not turn into cancer. The concern is a sore or patch that does not heal, or a white (leukoplakia) or red (erythroplakia) patch that persists — these can sit alongside or precede oral cancer, especially in people who use tobacco, gutka, or areca nut. The ulcer itself is less important than how long it lasts and whether the tissue around it looks or feels abnormal.
Often, yes. Everyday ulcers tend to be painful, while many early oral cancers cause no pain at all. Because of this, people sometimes ignore a hard, pain-free patch or lump for months. Do not use pain as your guide. A sore, patch, or lump without pain that lasts more than three weeks deserves the same prompt review as a painful one — sometimes more.
Risk is highest in people who use any form of tobacco — cigarettes, bidis, or smokeless products such as gutka, khaini, and pan masala — and those who chew areca nut (supari). Alcohol adds to the risk, and combining tobacco with alcohol multiplies it. A history of oral submucous fibrosis or persistent white or red patches also raises risk. If you fall into any of these groups, a non-healing sore should be reviewed without delay.
Your visit begins with a 45-minute consultation. A specialist examines the mouth, tongue, and neck, asks about how long the sore has been present, and looks for white or red patches and lumps. If anything needs confirming, a small biopsy is taken and the sample is read by a pathologist. Most people who come in with a worry leave reassured. When something does need treatment, decisions are made by a tumour board, not a single doctor, with transparent costs and no unnecessary tests.