Black hairy tongue looks like something is badly wrong, and it almost never is. The small bumps on your tongue, the papillae, normally shed as they grow. When they grow longer than usual instead, they trap bacteria, food, and stains, which gives the tongue a furry, dark look. It is harmless and clears up once you know what to do.
Here is what causes it, how to clear it, and when to check in with a dentist. You can also scan your tongue and watch it improve.
What it actually is
The color is not really about anything black inside you. The overgrown papillae act like a tiny carpet that holds onto pigments from food, drink, and tobacco, plus the bacteria that naturally live in your mouth. The result can look black, brown, green, or yellow depending on what is staining it.
Common causes
Black hairy tongue usually follows a change in your mouth's environment:
- A course of antibiotics, which shifts the balance of bacteria
- Some antihistamines and other medications
- Smoking or chewing tobacco
- A dry mouth
- Lots of coffee or black tea
- A soft diet that does not scrub the surface
- Light oral hygiene, especially skipping the tongue
Is it serious
No. It does not damage the tongue and it is not a sign of cancer. It can come with a slightly furry feeling, a bad taste, or, for some people, a gagging sensation, but it is a cosmetic and hygiene issue rather than a medical one.
How to clear it
The fix is mechanical and quick for most people:
- Brush your tongue gently twice a day, or use a tongue scraper
- Drink water through the day to keep the mouth moist
- Cut back on smoking, coffee, and black tea
- Add coarser, fresh foods that naturally scrub the surface
- Ask your dentist or doctor if a medication might be the trigger
Most cases clear within a week or two of regular tongue cleaning.
When to see a doctor or dentist
Check in if:
- It does not improve after a couple of weeks of tongue cleaning
- You think a prescription medication is the cause
- There is pain, a sore, or a patch that will not wipe off
Frequently asked questions
Is black hairy tongue serious?+
No. It looks alarming but is harmless and reversible. It happens when the tongue's bumps grow longer and trap bacteria and stains.
How do I get rid of black hairy tongue?+
Brush your tongue or use a scraper twice a day, stay hydrated, and cut back on smoking, coffee and black tea. It usually clears within a couple of weeks.
What causes a black tongue?+
Antibiotics, some antihistamines, smoking, a dry mouth, lots of coffee or tea, a soft diet, and light oral hygiene are the usual triggers.
Related
Sources
- Cleveland Clinic, Tongue color
- Healthline, Tongue color: what is healthy, what is not
This article is for general education and is not medical advice. It does not replace a consultation with a qualified clinician. If a symptom worries you, see a doctor.