Dra. Cléo Salustiano In this article
SummaryWhat geographic tongue and fissured tongue areHow to ease symptoms, how to clean and when to get checkedFAQRead nextGeographic Tongue and Fissured Tongue: What They Are and When to Worry
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Geographic tongue is a benign change in which areas of the tongue lose their papillae and become red and smooth with a whitish border, moving around over time; it can cause burning with acidic and spicy foods. Fissured, or cracked, tongue is a variation with grooves on the surface that calls for gentle cleaning to prevent debris buildup, burning and bad breath. Neither is contagious or turns into cancer, and they usually need no treatment. Fixed patches, white patches that do not wipe off, sores that do not heal in about two weeks or hardened areas need to be assessed. In Mooca, Dr. Cléo Salustiano (CRO-SP 170844) sees patients every day, from 8 a.m. to 10 p.m.
Geographic tongue and fissured tongue are two common, benign changes of the tongue. In geographic tongue, smooth red patches with a whitish border appear and change shape and location over days or weeks, looking like a map. In fissured tongue, also called cracked tongue, the surface has grooves or "cracks" of varying depth. Neither is contagious or turns into cancer, and they often appear together in the same person.
In most cases, no treatment is needed: the focus is easing the burning when it occurs and keeping the tongue clean, especially when there are fissures, where food debris builds up. What needs attention are patches that do not move, sores that do not heal, white patches that do not wipe off or hardened areas: these signs do not fit geographic tongue and need to be assessed.
Dr. Cléo Salustiano (CRO-SP 170844), a dentist in Mooca, explains what these changes are, what may cause them, how to tell them apart from other patches on the tongue and when to see a dentist.
This article comes from Dr. Cléo Salustiano's dental office in Mooca, São Paulo (care in English, Portuguese and Spanish). See the general dentistry page to learn how the treatment is done here and book your assessment.
What geographic tongue and fissured tongue are
The tongue is covered with tiny projections, the papillae, which give it a velvety texture. In geographic tongue (technically, benign migratory glossitis), some areas lose these papillae for a while and become red and smooth, with a slightly raised white or yellowish border. Later the area recovers and another appears elsewhere, which is why the pattern "migrates". The exact cause is unknown; it is linked to family predisposition and, in some people, to psoriasis, allergies and stress.
Most people with geographic tongue feel nothing and find out by chance, in the mirror or at a dental visit. Some feel burning or sensitivity with acidic, spicy, very salty or hot foods, with alcoholic drinks and with some strongly flavored toothpastes. This discomfort tends to come and go with the phases of the patches.
Fissured tongue is an anatomical variation in which the surface has grooves, usually a central groove and others on the sides. It may be present from an early age and tends to become more visible with age. It usually does not hurt, but the grooves trap food debris and bacteria, which can cause burning, bad breath and favor fungal infection when cleaning is difficult. It may appear together with geographic tongue and, more rarely, with some systemic conditions that a physician evaluates.
Not every "cracked tongue" is fissured tongue. A very dry mouth, dehydration, nutritional deficiencies (such as iron and B vitamins), thrush and some medications can make the tongue look cracked, sore or too smooth. So when the change appears suddenly or comes with constant burning or other symptoms, it is worth investigating. For white coating and patches, the article white tongue: causes and when to see a dentist complements this topic.
| What it looks like | What it may be | What to do |
|---|---|---|
| Smooth red patches with a white border that move around | Geographic tongue | Benign; ease burning if present |
| Fixed grooves or cracks on the surface | Fissured tongue | Gentle tongue cleaning |
| Dry, cracked, burning tongue that appeared recently | Dry mouth, dehydration, nutritional deficiency or fungus | Assessment to find the cause |
| Whole tongue smooth, red and sore | Possible nutritional deficiency or other general cause | Dental and medical assessment |
| White patch that does not wipe off or fixed red patch | Lesion that needs a diagnosis | Assessment as soon as possible |
| Sore that does not heal in ~2 weeks or hardened area | Lesion that needs a diagnosis | Assessment as soon as possible |
How to ease symptoms, how to clean and when to get checked
With geographic tongue, when there is burning, it may help to notice which foods make it worse (acidic, spicy, very salty, cinnamon, strong mint) and cut back on them during flare-ups; avoid alcohol and smoking; choose mild-flavored toothpastes and alcohol-less mouthwashes; and drink plenty of water. When the burning is intense or frequent, the dentist assesses and may suggest ways to relieve it. Topical pharmacy products should only be used with the advice of a physician, dentist or pharmacist and according to the package insert.
With fissured tongue, the focus is hygiene: brush or use a tongue cleaner gently, from back to front, stretching the tongue to open the grooves, without scraping hard enough to hurt. Drinking water after meals also helps remove debris. If bad breath persists, it is worth checking the gums and how well the teeth are being cleaned; the article on bad breath and gum disease explains this link.
Have it checked if a patch does not change location within a few weeks, if there is a sore that does not heal in about two weeks, a white patch that does not wipe off, a persistent red area, hardening, unexplained bleeding or a lump. These signs are not typical of geographic tongue and need an exam, especially in people who smoke or drink often. Most of the time the diagnosis is clinical; when in doubt, the dentist assesses and, when necessary, refers you to an oral medicine professional.
This content is for information only and does not replace an exam. Consult a dentist if you notice patches, cracks or burning on your tongue and want to understand what they are. In Mooca, Dr. Cléo Salustiano sees patients every day, from 8 a.m. to 10 p.m., including Sundays and holidays, for general dentistry and preventive dentistry in Mooca, with check-ups that include examining the tongue and the whole mouth.
Is geographic tongue serious?
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No. Geographic tongue is a common, benign change that is not contagious and does not turn into cancer. Many people live with it all their lives without symptoms. What matters is confirming the diagnosis at an assessment, because other patches on the tongue may need different care.
Can geographic tongue be cured?
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There is no treatment that makes geographic tongue go away for good, and in most cases none is needed. The patches may disappear for long periods and come back. When there is burning, the focus is relieving symptoms by avoiding irritating foods and following your dentist's advice.
What causes geographic tongue?
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The exact cause is unknown. It is more common in people whose relatives have it and may be linked to psoriasis, allergies and stress. It often appears together with fissured tongue. It is not caused by poor hygiene.
What does a cracked tongue mean?
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Often it is simply fissured tongue, a benign variation that becomes more visible with age. But the tongue can also look cracked because of dry mouth, dehydration, nutritional deficiencies, fungal infection or medication side effects. If the change appeared suddenly or comes with constant burning, have it checked.
How do I clean a fissured tongue?
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Use a soft brush or tongue cleaner gently, from back to front, stretching the tongue to open the grooves, without pressing hard enough to hurt. Do it daily, along with brushing and flossing. Drinking water after meals also helps remove debris.
Is geographic tongue normal in children?
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It can appear in children and is generally as benign as in adults. If the child feels burning, cutting back on acidic and spicy foods during flare-ups helps. It is worth showing it to a dentist to confirm the diagnosis; when necessary, the dentist assesses and refers to a pediatric dentist.
Where can I have tongue patches checked in Mooca?
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In Mooca, Dr. Cléo Salustiano (CRO-SP 170844) sees patients at Rua Hipódromo, 1141, near Bresser-Mooca station, Monday to Sunday, from 8 a.m. to 10 p.m., including holidays. Appointments via WhatsApp (11) 97409-7834, in Portuguese, English or Spanish.
