Kattha for Mouth Ulcers and in Paan: Honest Uses and Cautions
Kattha (catechu) is the dark brown paste in every paan, and many families also use kattha for mouth ulcers, dabbing a pinch straight on the chhala. It is a strong astringent that can sting a chhala into feeling smaller, but it hides two real risks: the paan habit it travels with, and ulcers that are not ordinary ulcers at all.
The short version
- What it is: a boiled-down extract of the heartwood of the khair tree (Acacia catechu), dried into cakes or powder
- Main use: paan, where it is spread with chuna (slaked lime) on the betel leaf
- Home use: dabbed on mouth ulcers, used in tooth powders and gargles
- Biggest risk: not kattha itself but supari and tobacco, which travel with it
- Red flag: any mouth ulcer or patch lasting more than 3 weeks needs a doctor or dentist
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What is kattha, and how is it made?
The khair tree grows wild in the dry forests of India, Pakistan’s northern foothills and Nepal. Its dark red heartwood is chipped and boiled for hours in large iron pans, the liquid is thickened, cooled and then dried into blocks, which is the brown, slightly shiny kattha you buy as cakes, pieces or powder. The taste is bitter, then drying, then faintly sweet; that drying, mouth-puckering feeling comes from catechins and tannins, the same family of compounds that make strong black tea feel rough on the tongue.
It’s a relative of the babool tree. If you’ve read our babool guide, the bark gargle there works on the same tannin idea, just weaker.
Why is kattha in paan?
A paan maker spreads a thin layer of chuna and a thin layer of kattha on the betel leaf. Together, and once chewed with the leaf, they turn the saliva that famous brick red. Kattha adds the bitter, drying note that balances the sweet fillings, and it cuts the soapy sting of the lime a little.
Here’s the honest part. The paan habit is a leading cause of mouth cancer in South Asia, mainly because of supari (areca nut), which is classed as a cause of cancer even without tobacco, and because of the tobacco many people add. Chuna is caustic and scrapes the inner cheek over time. Our paan, supari and mouth cancer guide covers this in full, so we won’t repeat it, but in short: a meetha paan without supari or tobacco, now and then, is a very different thing from a daily paan with supari and zarda.
Kattha isn’t the villain of the paan. Supari and tobacco are.
Does kattha help mouth ulcers?
What people say
“Put kattha on a chhala and it will be gone by morning.” Many people swear by it, and some mix it with honey, glycerine or turmeric into a paste.
What tradition says
In Unani and Ayurvedic practice kattha is described as cold and drying, astringent and cleansing for the mouth, and it is a classic ingredient of manjan (tooth powder), mouth-ulcer powders and throat lozenges. Tradition uses it for spongy gums, sore throats and loose motions too.
Our honest take Depends
Kattha tightens and dries the surface, which can make a small ulcer sting less after the first sharp burn, and it may help keep the spot clean. It doesn’t make an ulcer heal faster in any way that’s been shown well, and ordinary ulcers (aphthous ulcers) settle on their own in 7 to 14 days anyway. It’s fine for a small, clearly ordinary ulcer if you like it; it is wrong for any sore you’re not sure about. For gentler options, our mouth ulcer home care guide covers what actually soothes and why ulcers keep coming back.
How to look after a mouth ulcer at home
Whether or not you use kattha, these are the basics that matter:
- Rinse with salt water: half a level teaspoon of salt in 250 ml of warm water, swish for 30 seconds and spit. Repeat after meals.
- If you use kattha, crush a tiny pinch, wash your hands, touch it lightly onto the ulcer only, and don’t swallow for a minute. Expect a sharp sting for a few seconds.
- Don’t use it more than a few times in a day; repeated drying can leave the edges raw.
- Avoid spicy, sour and very hot food for 2 to 3 days, and switch to a soft toothbrush.
- Note the date the ulcer appeared. If it’s still there at 3 weeks, book a doctor or dentist.
When is a mouth ulcer not just an ulcer?
This is the bit that saves lives. Get a mouth sore checked by a doctor or dentist if:
- it lasts more than 3 weeks, even if it doesn’t hurt
- it’s painless, hard at the edges, or growing
- there’s a white or red patch on the gums, tongue or inner cheek that doesn’t rub off
- it bleeds easily, or you feel a lump in the mouth or neck
- you chew supari, gutka, naswar or tobacco, or smoke, and have any new patch at all
Painless is the dangerous word. An early cancer often doesn’t hurt, and a numbing powder can hide what little warning there is.
Myth: kattha is a blood purifier and good for iron
No. Kattha, like strong tea, is rich in tannins, and tannins bind to the iron in plant foods, so less of it is absorbed. If you’re low in iron, or pregnant, keep kattha, paan and strong tea away from your main iron-rich meals by an hour or two. Our iron-rich desi foods guide covers what helps absorption instead.
Myth: red saliva means the paan is good quality
The red is chemistry between leaf, kattha and lime, plus any colour the shop adds. A very bright, almost artificial red can be a sign of added dye rather than good kattha.
How to spot fake or adulterated kattha
Because real kattha takes long boiling, cheap substitutes are common.
- Real: dark brown to reddish brown, breaks with a dull or glassy edge, bitter then astringent taste.
- Suspect: very light, chalky, or dusty powder; a strongly sweet taste; a colour that bleeds bright red into water at once.
- Common substitute: gambier (“pale catechu”, from a different plant) is sometimes sold as kattha. It’s paler and milder.
- What a test proves: nothing at home can confirm purity. Buy from a busy, reputable shop and prefer sealed packs with a maker’s name.
Store cakes in an airtight jar away from damp; kattha absorbs moisture and goes soft and mouldy.
Did you know?
Under the name cutch, catechu was once a major brown dye for cloth, sails and fishing nets, because its tannins helped protect the fibres from rotting in sea water. The same tannins are why it puckers your mouth.
Pregnant and breastfeeding women should avoid kattha as a medicine and skip paan with supari or tobacco entirely. Don’t put kattha in a young child’s mouth: it stings, children swallow it, and a child’s ulcer that isn’t settling needs a doctor. People with iron deficiency should keep it away from meals. If you take regular medicines, ask your pharmacist whether a tannin-rich powder could affect how they’re absorbed. And any ulcer past 3 weeks, any painless sore or patch, or any lump means an appointment, not another dab.
Kattha questions, answered
What is kattha made from?
Kattha is made by boiling chips of the heartwood of the khair tree (Acacia catechu) and drying the thick liquid into cakes. It’s sold as blocks, pieces or powder.
Is kattha good for mouth ulcers?
It can make a small ordinary ulcer sting less and feel drier, but it hasn’t been shown to make it heal faster. Ordinary ulcers settle in 7 to 14 days on their own. Any ulcer lasting over 3 weeks needs a doctor or dentist.
Is kattha harmful?
On its own and in small amounts, kattha is not the main danger in paan. The harm in the paan habit comes mostly from supari and tobacco, and from chuna scraping the cheek. Kattha’s tannins can reduce iron absorption.
What is kattha in English?
Kattha is called catechu or cutch in English. The tree is Acacia catechu, called khair in Urdu and Hindi.
Can I eat paan without supari?
A meetha paan with leaf, kattha, a little chuna and sweet fillings, without supari or tobacco, is far less risky than the usual paan. Keep it occasional, and watch for any mouth patches if you’ve chewed supari in the past.
Why does kattha sting so much on an ulcer?
Its tannins tighten the raw surface of the ulcer and the nerve endings react with a sharp burn. The sting usually lasts a few seconds. If pain lasts or the ulcer looks worse, stop using it.
Can kattha be used in pregnancy?
Avoid it as a medicine in pregnancy, because there’s no clear safety information. Skip paan with supari and tobacco completely. Mouth ulcers in pregnancy can be soothed with salt water rinses.
Does kattha whiten teeth?
No. Kattha is a strong brown dye and can stain teeth with regular use. It’s used in some tooth powders for its drying taste, not for whitening.
Can I put kattha in my child’s mouth for chhale?
No. It stings badly and children swallow it. Use a soft diet and cool water, and see a doctor if a child’s ulcer lasts more than a week or two, or comes with fever.
How do I know if a mouth ulcer is serious?
Worry if it lasts more than 3 weeks, doesn’t hurt, feels hard, bleeds, grows, or sits next to a white or red patch. Paan, gutka, naswar and smoking raise the risk. Book a doctor or dentist without delay.
How to identify pure kattha?
Pure kattha is dark reddish brown and tastes bitter then drying. Very pale, chalky or very sweet samples are suspect. No home test proves purity, so buy sealed packs from known sellers.
For more traditional remedies with honest verdicts, see Desi Remedies.