Sore or white tongue
The tongue is the one place people inspect themselves, and they are almost always alarmed by what they find.
On this page
- What exactly has changed: coating, patch, soreness
- The white coating that wipes off: thrush
- The patch that does not come off and the ulcer that does not heal
- The pattern on the tongue that looks alarming but is not
- When the tongue is sore and burning but looks healthy
- Mouth ulcers and lichen planus
- What eases the soreness and what makes it worse
- Online consultation
Medicines commonly prescribed for Sore or white tongue
For informational purposes only. Always consult a doctor before taking any medication.
Dosage form: ORAL SOLUTION/SUSPENSION, 20 mg/gActive substance: miconazoleManufacturer: Esteve Pharmaceuticals S.A.Prescription requiredDosage form: INJECTABLE, 10 mg hydroxocobalamin/2 mlActive substance: hydroxocobalaminManufacturer: Aristo Pharma Iberia S.L.Prescription requiredDosage form: INJECTABLE, 1 mg/mlActive substance: hydroxocobalaminManufacturer: Laboratorios Basi Industria Farmaceutica S.A.Prescription required
The tongue is the one place people inspect themselves, and they are almost always alarmed by what they find. One day it is coated white, the next it stings with anything acidic, the next a strange pattern has appeared on it. Most of the time the reason is trivial: a bite, tea that was too hot, a dry mouth, a new toothpaste. But the tongue has one property that makes it worth looking at properly: changes show up there earlier than anywhere else in the mouth, and one of those changes must not be missed. The distinction the whole subject starts from is this — a white coating that wipes off and a white patch that does not wipe off are two different things carrying different weight.
What exactly has changed: coating, patch, soreness
Before looking for a cause it helps to work out what you are seeing. Take a clean spoon or a piece of gauze and run it gently over the altered area:
- the coating comes off and leaves a red, sometimes bleeding surface underneath — that points to something sitting on top, usually fungal or related to cleaning;
- the patch does not come off and does not change with brushing, and its edge feels firmer than the lining around it — that is a change in the surface itself, and it calls for a different conversation;
- the tongue is sore or burning but looks normal — then the answer is not in the mirror but in blood tests and in your list of medicines;
- there is a single ulcer with a flat floor and a red rim — that suggests mouth ulcers if it heals, and something else if it does not.
It is worth noting what comes with it: a dry mouth, an odd taste, pain with spicy and acidic food, changes in taste, bad breath, enlarged glands under the jaw. And worth recalling what is new in the last few weeks: a medicine, an inhaler, a denture, a course of antibiotics, a chipped tooth that rubs the tongue.
The white coating that wipes off: thrush
The commonest cause of a white tongue in an adult is oral thrush, an overgrowth of the candida fungus. It looks like a curd-white coating on the tongue, on the inside of the cheeks and on the palate; the coating wipes off and leaves a red surface. The tongue can be sore, taste becomes blunted, a metallic or salty flavour appears, and the corners of the mouth may crack.
Candida lives in almost everyone's mouth and overgrows when it is given the conditions. Hence the list of things worth checking:
- steroid inhalers for asthma and chronic lung disease — the most underrated cause of the lot. Rinsing the mouth with water after every dose and using a spacer removes it almost completely;
- a course of antibiotics just finished, which has thinned out the mouth's usual flora;
- a dry mouth — from medicines, from mouth breathing, from drinking too little, after radiotherapy. Saliva washes the fungus away, and without it the fungus stays;
- diabetes with poorly controlled sugar: thrush that keeps coming back in an adult is a reason to check for it, even with no previous diagnosis;
- weakened immunity — from treatment with steroids and with drugs that damp down the immune system, in blood disorders, in HIV;
- a denture worn round the clock and cleaned badly.
Thrush is treated with local antifungals and, if it is stubborn, with medicine taken by mouth. But the main thing is to remove the condition that allowed it: without that it will return. Thrush that comes back again and again is not really about the fungus, it is about the cause.
The patch that does not come off and the ulcer that does not heal
This is what must not be missed, and the reason to read this page to the end. You should see a doctor without putting it off if in the mouth or on the tongue there is:
- an ulcer that has not healed in more than three weeks, particularly if its edges are firm and raised and it hurts little or not at all;
- a persistent white patch that does not wipe off with cleaning and does not clear over several weeks;
- a red, velvety patch with a clear border that does not change;
- a thickening or a lump in the tongue, in the floor of the mouth or in the cheek, that can be felt with the fingers;
- a firm, fixed gland in the neck, numbness of part of the tongue or lip, pain running up to the ear, a tooth loosening for no reason.
These changes go under one heading — pre-cancerous change and cancer of the lining of the mouth — and they are sorted out by examination and, if needed, by taking a piece of tissue for testing. Most such patches will turn out to be harmless, but they are meant to be checked rather than watched for months. Two factors decide almost everything here: tobacco in any form, chewing tobacco included, and alcohol, and together they act more strongly than either does alone. Separately: a white patch is not something to try to scrub away with a brush or a scraper. Scraping does not treat it and, more importantly, delays the examination that settles the question.
The pattern on the tongue that looks alarming but is not
Two conditions look worse than they are.
Geographic tongue. Smooth reddish areas without papillae appear on the tongue, ringed by a pale wavy border, rather like the outline of a continent. The pattern changes from day to day and moves about, and that is exactly how it is recognised. It is not an infection, it is not catching and it needs no treatment; sometimes the tongue stings with acidic and spicy food and with fizzy drinks, and then those are simply dropped.
Hairy tongue. The papillae on the back of the tongue fail to wear down as they normally would, grow longer and take up staining from coffee, tea, smoking and some mouthwashes. The tongue looks as though it has a pile on it, and the colour runs from white and yellow through brown to almost black. It is the appearance that alarms, not the substance: gentle cleaning of the back of the tongue with a brush or scraper helps, along with stopping smoking, drinking enough and eating ordinary food, which wears that coating off mechanically.
When the tongue is sore and burning but looks healthy
That combination is a classic reason for going from one doctor to the next, and it is usually settled by a blood test. Burning and soreness of a smooth, reddish tongue can be a sign of a deficiency:
- vitamin B12 — the tongue turns smooth, glossy and sore, and tiredness, tingling in the hands and feet and pallor come with it. The deficiency turns up with a strictly plant-based diet, after stomach surgery, in stomach disease and with the long-term use of certain medicines;
- iron — the same smoothness and burning, brittle nails, hair coming out, cracks at the corners of the mouth, exhaustion;
- folate — a picture close to the other two, and often present alongside them.
Hence a simple rule: if the tongue burns and aches for weeks and there is nothing to be seen on it, it makes sense to have a full blood count, ferritin, vitamin B12 and folate checked rather than to keep changing toothpaste. The cause may also be something else: a dry mouth, a habit of biting the tongue, a chipped tooth or a denture that rubs, a reaction to a toothpaste ingredient, and a diagnosis in its own right, burning mouth syndrome, in which the tongue hurts with no visible change and no deficiency.
Mouth ulcers and lichen planus
Mouth ulcers are small round sores with a greyish-white floor and a red rim, most often along the sides of the tongue and inside the lips and cheeks. They hurt out of all proportion to their size, get in the way of eating and heal on their own within one or two weeks, leaving nothing behind. They are provoked by injury, stress, short sleep, hormonal swings and toothpastes containing sodium lauryl sulphate. Local products from the pharmacy help, as does dropping acidic and spicy food for a few days. If ulcers are large, take more than three weeks to heal, keep returning or come with ulcers elsewhere on the body and abdominal pain, the search moves on to a general cause.
Lichen planus in the mouth looks like white lacy lines and a network on the cheeks and along the sides of the tongue, sometimes with redness and painful erosions. It is not catching, it runs for years, it flares with stress and with rubbing, and it is treated with local anti-inflammatory medicines. One important detail: such areas need regular review with a dentist or doctor, because an altered lining needs keeping an eye on, and any new non-healing spot arising on it is checked separately.
What eases the soreness and what makes it worse
While the cause is being established, simple things help the tongue:
- a soft brush and careful cleaning of the teeth and the back of the tongue; hard rubbing makes the soreness worse;
- toothpaste without sodium lauryl sulphate if ulcers or burning turn up in your mouth often;
- cool drinks and soft food — coolness on its own blunts the pain, and a straw helps you get past the sore spot;
- a painkiller — paracetamol or an anti-inflammatory at the usual dose; aspirin is not given to children or teenagers, and a tablet must not be held on the tongue or pressed against an ulcer;
- dropping what irritates: acidic, spicy, very hot and hard food, strong spirits, smoking;
- drinking enough and treating a dry mouth; if medicines are causing the dryness, that is worth raising with a doctor rather than putting up with.
One more thing: the dentist is not a "later on" here. A chipped tooth, a sharp edge on a filling, a poorly fitting denture that rubs the tongue for weeks are a common and entirely fixable cause of soreness — and at the same time the place where a non-healing ulcer most often appears.
Online consultation
An online doctor can help sort what you see in your mouth onto the right shelves: whether the coating comes off or not, whether this resembles thrush, a geographic tongue, or a change that needs examining in person and possibly a biopsy. They can go through your medicines and inhalers to see whether those are producing the white coating and the dryness, say which blood tests are worth having when the tongue burns, and explain how to use an antifungal properly so the thrush does not come back. And they can say separately whether anything among your findings belongs in the group where you do not wait but book an examination.
This material is for information only and does not replace medical advice.
Consult with a doctor about Sore or white tongue
Discuss your symptoms and possible next steps with a doctor online.
Online doctors for Sore or white tongue
Discuss your symptoms and possible next steps for Sore or white tongue with a doctor online.
