Hairy tongue happens when dead skin cells build up on your tongue's papillae (bumps), trapping food, bacteria, or yeast, making them look dark and furry, often caused by poor oral hygiene, antibiotics, tobacco, excessive coffee/tea, dry mouth, or soft diets that prevent normal shedding. It's usually harmless but can be linked to certain medications, chemotherapy, alcohol, dehydration, or weak immune systems.
Black hairy tongue usually doesn't need medical treatment. Though it may not look good, it's usually a short-term, harmless condition. Good mouth and tongue cleaning can help get rid of black hairy tongue. So can stopping things that may lead to the condition, for example, not using tobacco or irritating mouthwashes.
Individuals with a persistent coating on the tongue should consult their dentist or other trained oral health professional. Hairy tongue that does not resolve with such simple measures may be treated with medical or surgical treatments by qualified individuals.
In addition to a coated tongue, many women complain of dry mouth and burning mouth syndrome (see above). Quite often a vitamin deficiency (vitamin B12) is the cause.
Poor oral hygiene practices and a diet predominantly comprising soft foods can impede the natural shedding of papillae, thereby fostering bacterial accumulation. Additionally, excessive consumption of substances like tobacco, alcohol, coffee, and tea has been linked to an increased risk of hairy tongue.
Black hairy tongue usually happens when the many tiny, rounded bumps on the tongue, called papillae, grow too long because they don't shed dead skin cells. Food, drinks, tobacco, bacteria or yeast, and other substances can get trapped on the papillae and stain them. This makes the tongue look dark and hairy.
Tongue warning signs include changes in color (white patches for thrush/leukoplakia, pale for anemia, purple for poor circulation, bright red for infections/deficiencies), texture (smooth for glossitis/B12 lack, bumpy for infections/stress, black hairy for buildup), or presence of sores/lumps (ulcers, oral cancer signs if persistent), with signs like swelling, pain, or persistent changes signaling potential dehydration, allergies, vitamin issues, or serious infections/cancers that need a doctor's attention, especially if with other symptoms like breathing issues or difficulty swallowing.
Oral thrush is a fungal infection of the mouth caused by a group of yeasts called Candida. People with a weak immune system are at an increased risk of developing oral thrush. Symptoms include white patches on the tongue that can often be wiped off easily.
B12 deficiency can trigger specific food cravings, most notably for meat, fish, or eggs, as the body seeks animal-based sources to replenish the vitamin, especially in those on vegetarian/vegan diets or older adults. While cravings for sugary or salty foods can also signal general B-vitamin issues, the distinct urge for protein-rich animal products is a key indicator, but professional testing is crucial for confirmation.
1 Several antibiotics, including minocycline, doxycycline, erythromycin, linezolid, amoxicillin-clavulanate, metronidazole and piperacillin–tazobactam, have been reported to cause black hairy tongue.
Dehydration - not drinking enough fluid can cause thick saliva and a dry mouth. Other causes of dehydration include medical conditions such as blood loss, chronic diarrhoea or kidney failure.
Hence, you might notice jaw pain, teeth grinding or bruxism, and teeth marks on the side of your tongue. Plus, bruxism also leads to tongue biting, which can be why your tongue looks wavy on the edges. Gradually, pressing your tongue against your teeth due to anxiety can lead to a scalloped tongue.
Poor oral hygiene, tobacco use and certain medications are just a few of the things that can cause black hairy tongue. You can usually manage the condition with improved oral hygiene.
Easy At-Home Remedies to Try
Preventing and Managing Hairy Tongue
Floss Daily: Flossing helps remove food particles and bacteria from between your teeth, which can also affect your tongue. Use Mouthwash: Rinsing with mouthwash can help reduce bacteria buildup.
BHT is a relatively common disease that classically manifests as a black and hairy appearing lesion on the dorsum of the tongue arising from abnormally hypertrophied and elongated filiform papillae.
A Sign of Candida
This leads to a buildup of a bacteria or yeast called candida, and all of this shows on your tongue. If you have a white tongue, try these helpful solutions: Proper Oral Hygiene: Bad bacteria need to be prevented from entering your system and affecting your digestion.
Cutaneous manifestations associated with vitamin B12 deficiency are skin hyperpigmentation, vitiligo, angular stomatitis, and hair changes. A diagnosis of vitamin B12 deficiency is often overlooked in its early stages because these signs are not specific to vitamin B12 deficiency alone.
Look for these signs: Light, White Tongue Coating:reflects digestive function. Heavily Coated Tongue: this is caused by excessive pathogenic fluid, which indicates poor digestion. No Coating on Your Tongue: may meanthat your body is exhausted and is not producing enough fluids to promote healthy digestion.
Symptoms of vitamin B12 and folate deficiency anaemia include:
Here's what a quick glance at your tongue might help us catch: Oral Cancer: Persistent sores, lumps, or color changes on your tongue can be early warning signs. Nutritional Deficiencies: A swollen, smooth, or unusually colored tongue might suggest you're lacking key nutrients like iron, B12, or folic acid.
According to a recent study, tongue cleaners, in general, reduce the number of bacteria on the tongue. And the plastic tongue scraper in this study was the most effective in removing the bacteria.