What geographic tongue looks like
- Smooth, red, irregular patches on the top and sides of the tongue.
- White, grey or yellow slightly raised borders around the patches.
- Patches that change size, shape and location over days or weeks.
- Areas of normal tongue in between.
- Often seen together with a fissured (cracked) tongue; see cracked tongue.
Who gets geographic tongue
Geographic tongue affects people of all ages, including children, and is slightly more common in women. It may come and go for months or years. Its prevalence is estimated at around 1% to 3% of the population.
Possible causes and associations
- Psoriasis, which shares some features with geographic tongue.
- Fissured tongue.
- Allergies, eczema, asthma and hay fever.
- Family history.
- Hormonal changes, such as pregnancy or the contraceptive pill.
- Possibly vitamin deficiencies, though evidence is limited.
Geographic tongue is not caused by infection and is not contagious.
Symptoms
- Often none; it may be discovered at a dental check-up.
- Burning, stinging or soreness, especially with certain foods.
- Sensitivity to spicy, acidic, salty or very hot foods and drinks.
- Discomfort with mint toothpaste, mouthwashes or cinnamon.
Symptoms tend to come and go with flares.
Common triggers
- Spicy foods and hot peppers.
- Citrus fruits, tomatoes and vinegar.
- Salty snacks and crisps.
- Strong mint or cinnamon flavours.
- Alcohol and tobacco.
- Stress and tiredness.
How it is diagnosed
A dentist or doctor usually recognises geographic tongue from its appearance and history of changing patches. Tests are rarely needed. If the appearance is unusual, the patches do not move or there is a persistent ulcer, other conditions such as thrush, lichen planus, vitamin deficiency or, rarely, cancer may need to be ruled out.
How to ease discomfort
- Avoid foods and drinks that trigger burning.
- Use a mild, unflavoured or children’s toothpaste without sodium lauryl sulfate.
- Avoid alcohol-based mouthwashes.
- Rinse with plain water after meals.
- Use over-the-counter anaesthetic gels or mouth rinses during flares.
- Ask a dentist about prescribed rinses or steroid gels for painful flares.
Looking after your mouth
Brush gently twice a day, clean the tongue softly and keep up regular dental check-ups. Staying hydrated and managing stress may help reduce flares. If you notice burning even when no patches are visible, burning mouth syndrome or a deficiency may be considered.
See how to clean your tongue and tongue color.
Geographic tongue in children
Parents often notice the changing patches when a child sticks out their tongue. It is harmless, and many children have no symptoms. If a child refuses certain foods because of stinging, offering milder foods and a gentle toothpaste usually helps.
Geographic tongue and psoriasis
Geographic tongue is more common in people with psoriasis, particularly pustular psoriasis, and the changes under the microscope look similar. Some researchers consider it an oral form of psoriasis, although most people with geographic tongue never develop skin psoriasis. If you have both, mention your tongue to your dermatologist, as some psoriasis treatments may also improve it.
Conditions that can look similar
- Oral thrush: creamy white patches that wipe off, leaving red areas.
- Strawberry tongue: a red, bumpy tongue with fever in infections such as scarlet fever; see strawberry tongue.
- Lichen planus: lacy white lines that do not move.
- Vitamin deficiency glossitis: a smooth, red tongue all over, often with tiredness.
- Leukoplakia: fixed white patches, mainly in smokers.
The key feature of geographic tongue is that the patches move and change over time.
When to see a dentist or doctor
- A patch that stays in the same place for more than 2 to 3 weeks.
- An ulcer, lump or thickened area.
- Significant pain that affects eating.
- White patches that wipe off, suggesting thrush.
- Other symptoms such as tiredness or a sore, smooth tongue all over.
Key points to remember
- Geographic tongue causes harmless, moving map-like patches.
- It is not contagious and not linked to cancer.
- Some people feel burning with spicy, acidic or minty foods.
- Patches that do not move or ulcers should be checked.
Questions about geographic tongue
These answers are general information and do not replace an examination or individual medical advice.
Is geographic tongue serious?
No. It is harmless and not linked to cancer.
Is geographic tongue contagious?
No.
Does geographic tongue go away?
It often comes and goes, and may disappear for long periods.
What foods should I avoid with geographic tongue?
Spicy, acidic, salty and very hot foods, and strong mint or cinnamon if they cause burning.
Is geographic tongue linked to stress?
Stress may trigger flares in some people.
Can vitamin deficiency cause geographic tongue?
Evidence is limited, but deficiencies can cause other tongue changes and may be checked.
Can children have geographic tongue?
Yes. It is harmless in children too.
Can geographic tongue hurt?
It is often painless but can sting or burn with certain foods.
Does geographic tongue affect taste?
Taste is usually normal, although some people notice changes in sensitivity during flares.
Should I see a doctor for geographic tongue?
A dentist or doctor can confirm it, especially the first time you notice it or if it hurts.
Sources
This guide is for general information and does not replace medical advice. How a problem is diagnosed and treated depends on your examination and medical history. If you think you have an emergency, contact your local emergency services.