Oral Cancer and Tobacco: Why India Carries the Heaviest Burden

India accounts for a very large share of the world’s oral cancer cases, and the reason is not mysterious. Smokeless tobacco and areca nut are chewed daily by a vast number of people, often from adolescence, and the mouth is where the carcinogens sit for hours at a time.

Oral cancer is also one of the few cancers that can be seen and felt at an early stage, by the person themselves, with no equipment. That combination of high burden and easy visibility is why it is worth knowing the signs.

The products involved

• Gutka and pan masala with tobacco: areca nut, tobacco, slaked lime and flavourings
• Khaini: tobacco with slaked lime, held in the mouth
• Zarda, mawa, kharra, mishri, gul: regional tobacco preparations
• Betel quid with tobacco, the classic paan
• Areca nut alone, without tobacco, which is itself classified as carcinogenic
• Smoking tobacco: cigarettes, bidis, hookah
• Tobacco toothpaste and tooth powder, which many users do not recognise as tobacco at all

Alcohol multiplies the risk from tobacco rather than merely adding to it.

Oral submucous fibrosis

This condition deserves emphasis because it is common, is caused chiefly by areca nut, and is irreversible.

Fibrous bands form under the lining of the mouth. The symptoms progress in order: burning on spicy food, then a blanched, leathery, pale mouth lining, then a stiff tongue and difficulty blowing out the cheeks, then progressively reduced mouth opening until the person cannot insert two or three fingers between the teeth.

It is a premalignant condition, carrying a substantially increased risk of oral cancer, and it affects young people, including teenagers. Mouth opening lost to fibrosis does not come back; treatment slows progression and improves symptoms but does not restore normal tissue.

Premalignant lesions to recognise

Leukoplakia: a white patch that cannot be scraped off and has no other explanation.

Erythroplakia: a red velvety patch. Less common than leukoplakia but far more likely to be or become malignant.

Speckled leukoplakia: mixed red and white, high risk.

Lichen planus: lacy white striations, with a small malignant potential.

Any of these needs dental or ENT assessment and often a biopsy.

Signs of oral cancer

• A mouth ulcer that has not healed in three weeks
• A lump or thickening in the cheek, lip, tongue or floor of the mouth
• A white or red patch anywhere in the mouth
• Persistent pain, or pain on swallowing
• A persistent sore throat or hoarse voice
• Numbness of the tongue or lip
• Loose teeth with no dental cause, or dentures that stop fitting
• Difficulty moving the jaw or tongue
• A lump in the neck
• Unexplained bleeding in the mouth
• Unexplained weight loss

The commonest sites are the tongue margin, the floor of the mouth, and the buccal mucosa where a quid is habitually parked, which is a useful clue: look where you keep it.

Why diagnosis is late

Early lesions are painless. Pain generally appears once the tumour has invaded, by which time the stage is advanced. People attribute ulcers to a sharp tooth or spicy food. Many are reluctant to disclose tobacco use. And the mouth is examined less often than it should be.

Self-examination, once a month

In good light with a mirror:

1. Look at the lips, outside and inside, pulling them out
2. Pull each cheek out and inspect the lining
3. Stick out the tongue, look at the top, then lift it and look underneath and at the floor of the mouth
4. Pull the tongue gently to each side with gauze and look at the margins, the commonest cancer site
5. Tilt the head back and look at the roof of the mouth and the back of the throat
6. Feel the neck for lumps
7. Check whether you can open your mouth as wide as before, using three fingers as a rough gauge

Treatment

Treatment depends on stage: surgery, often with reconstruction, radiotherapy, chemotherapy, or a combination. Early-stage disease has a very good outlook; late-stage treatment is extensive, disfiguring, affects speech and swallowing, and survival falls sharply.

Quitting

Stopping tobacco and areca nut reduces risk substantially over years, though it does not return to that of a never-user immediately. Premalignant lesions often regress after stopping, which is a strong and immediate reason to stop. Support is available through India’s national quitline and mCessation service, and nicotine replacement helps with the tobacco component.

If you cannot stop on your own, that is a reason to ask for help, not a reason to continue.

This is general information. Any mouth ulcer, patch or lump lasting more than three weeks should be examined by a dentist or ENT specialist without delay.