What a normal tongue looks like
A healthy tongue is pink, slightly rough because of its tiny surface bumps, and often has a thin pale coating. Colour varies a little between people and through the day, and it is paler after a night of mouth breathing or when you are dehydrated.
People search for tongue colour disease, or tongue color disease, hoping a colour will name a condition. In practice, colour is one clue among several. Pain, texture, duration and the rest of your health matter as much.
Tongue colours and common causes
Most colour changes are harmless and temporary. The table below lists what is commonly behind each, and when to ask for a check. It is general information and cannot diagnose you.
| Colour | Common causes | See a dentist or doctor if |
|---|---|---|
| White | Coating of debris, dehydration, smoking, thrush | It does not scrape off or lasts more than two weeks |
| Red or smooth red | Irritation, low iron, B12 or folate, hot food, infection | It lasts more than two weeks or comes with sores |
| Bright red with bumps (strawberry) | Vitamin shortage, some infections, certain illnesses | It comes with fever or a rash, or in a child |
| Black or brown | Staining from tea, paan, tobacco; black hairy tongue; some medicines | A dark spot is new, growing, bleeding or not fading |
| Yellow | Coating, smoking, dry mouth, poor tongue cleaning | It persists with yellow skin or eyes (see a doctor promptly) |
| Purple or blue | Poor circulation, low oxygen, some medicines | It is new, especially with breathlessness (seek care at once) |
| Pale | Anaemia, low iron, dehydration | It comes with tiredness, breathlessness or dizziness |
Common tongue colour changes, usual causes and when to see a dentist or doctor. General information, not a diagnosis.
Where tongue colour comes from
Most of the colour is in the surface bumps. When they grow long, shed slowly or trap debris, they take up colour from food, drink, tobacco and bacteria. Blood supply and nutrition show through the tongue too, because it is covered in thin tissue with many vessels. Our guides on white tongue and black spots on the tongue cover the most-searched colours in more detail.
A smooth, red and sore tongue is covered in the guide on inflammation of the tongue.
When to see a dentist or doctor
See a dentist or doctor if a colour change lasts more than two weeks, comes with pain, burning, ulcers, a lump or a patch that will not rub off, or appears alongside tiredness, fever or unexplained weight loss. Any sore that has not healed in three weeks needs examining, as the mouth ulcers page sets out.
A blue or purple tongue with breathlessness, or a swollen tongue with trouble swallowing or breathing, is an emergency and needs a hospital emergency department.
Common questions
What colour should a healthy tongue be?
Pink, slightly rough, often with a thin pale coating. Small day-to-day variation is normal.
Can tongue colour show a disease?
It can hint at one, such as a deficiency or an infection, but colour alone is never enough to diagnose. A dentist or doctor looks at the whole picture and may order tests.
Why is my tongue yellow?
Most often a coating from smoking, a dry mouth or poor tongue cleaning. Yellow skin or eyes alongside it need a doctor soon.
Is a purple or blue tongue serious?
It can be, particularly when new and with breathlessness. It needs prompt medical assessment, and an emergency department if breathing is affected.
About this page
This page is general information, not a diagnosis or a quotation. Prices are prevailing Lucknow market ranges. Your own treatment and cost are determined after an examination. For questions about your own case, call +91 83036 12717.