Bumps on the Back of the Tongue: What Is Normal, What Causes Them, and When to Worry

You stuck your tongue out in the mirror, maybe to check a sore throat, and noticed something you had never seen before: a row of big, round bumps at the very back, or a lumpy patch near your throat. It is a common moment of alarm, and it sends a lot of people straight to a search for tongue cancer.

Most of the time, what you are seeing is normal anatomy that was always there. This guide shows what the back of a healthy tongue looks like, the common causes of new or sore bumps, what a white coating or a sore throat adds to the picture, how HPV fits in, and the signs that mean a bump should be checked.

Quick Answer

Bumps on the back of the tongue are usually normal. Everyone has 8 to 12 large taste bumps, the circumvallate papillae, in a V-shaped row across the back of the tongue, plus ridged folds on each side (foliate papillae) and lumpy lymph tissue behind them (the lingual tonsil). New, red or sore bumps are most often inflamed papillae, which settle on their own in a few days, or part of a throat infection such as a cold or strep throat. A white coating with bumps can be thrush. See a doctor or dentist for a bump or sore that lasts more than 3 weeks, is only on one side, bleeds, or comes with trouble swallowing, ear pain on one side, a hoarse voice or a lump in your neck.

In this guide:

• Are Bumps on the Back of the Tongue Normal?
• What Causes New or Sore Bumps
• Bumps With a Sore Throat: Cold or Strep?
• White Coating and Bumps: Could It Be Thrush?
• Bumps on the Back of a Child’s Tongue
• Can It Be HPV or Cancer?
• How to Get Rid of Them
• When to See a Doctor or Dentist
• The Verdict

Are Bumps on the Back of the Tongue Normal?

Yes. The back of every tongue is bumpy, and the bumps are bigger there than anywhere else on it. Most people only notice them when they look closely for the first time, often because of a sore throat, and then assume they are new. Three normal structures account for nearly all of it:

The Merck Manual, a standard medical reference, notes that the lingual tonsils at the back of the tongue “should not be mistaken for lesions”. The V-shaped row of circumvallate papillae is the classic “I just found bumps on my tongue” discovery. You are born with them, and in a study comparing young adults with people aged 60 to 85, their number did not increase with age.

Two clues that a bump is one of these normal structures: it matches its partner on the other side, because the V row and the side folds are symmetrical, and it has been the same for as long as you have been looking. A single bump on one side that is growing, sore or bleeding is a different matter (see when to see a doctor).

What Causes New or Sore Bumps

Bumps that feel new, look redder or bigger than usual, or hurt usually mean those normal structures have become irritated or inflamed. The common causes, from most to least likely:

• Inflamed papillae (“lie bumps”). One or a few small, painful red or yellowish bumps that appear suddenly and clear on their own. Doctors call this transient lingual papillitis. It was described as relatively common in a 1996 survey, is harmless and short-lived, and its exact cause is still poorly understood. It usually affects the front and middle of the tongue, so it is a less likely explanation for bumps right at the back.
• A throat infection. A cold, flu or strep throat inflames the whole back of the mouth, including the lingual tonsil, which is lymph tissue that swells when it fights an infection. The bumps can look bigger and redder and hurt when you swallow. See bumps with a sore throat.
• Reflux. Stomach contents that reach the throat can irritate the base of the tongue. In a study of 102 adults examined with a camera, signs of throat reflux and a body mass index over 30 were both linked to a larger lingual tonsil, while a history of allergies was not. Night-time heartburn is covered in can you die from acid reflux in your sleep.
• Oral thrush. A yeast infection that leaves white patches on the tongue and throat. See white coating and bumps.
• Mouth ulcers. Canker sores can form at the back or sides of the tongue: round or oval sores with a gray-white base and a red rim.
• Irritants. Very hot food or drinks and smoke can burn or irritate the tongue and leave it sore for a few days.

Rarer causes include viral infections in children (below), HPV warts, and, rarely, cancer at the base of the tongue, which has its own section.

Bumps With a Sore Throat: Cold or Strep?

Swollen, tender bumps at the back of the tongue together with a sore throat are almost always part of a throat infection, and they settle as it does. The question is whether it is a virus or strep throat, because only strep needs antibiotics.

According to the CDC, viruses cause most sore throats: only about 1 in 10 adults and 3 in 10 children with a sore throat have strep. These signs point each way:

A quick swab test at a clinic tells the two apart. Flu is tested for the same way, and flu A vs flu B explains why a negative rapid flu test does not always rule it out. If the bumps are still swollen or sore a couple of weeks after the throat infection has cleared, have them looked at.

White Coating and Bumps: Could It Be Thrush?

A thin, even whitish coating at the back of the tongue is common, especially in the morning, because that is where the tiny filiform papillae trap dead cells, food and bacteria, and it is the hardest part of the tongue to clean. It brushes off and comes back.

Thrush looks different: thicker white or creamy patches, which can also cover the inner cheeks, roof of the mouth and throat, often with redness, soreness, a cottony feeling, loss of taste, pain on eating or swallowing, or cracks at the corners of the mouth. It is caused by an overgrowth of Candida yeast, which normally lives in the mouth harmlessly. The CDC says thrush is uncommon in healthy adults; the people most likely to get it:

• Babies under a month old and people who wear dentures
• People taking antibiotics or corticosteroids, including inhaled steroids for asthma
• People with diabetes, cancer or HIV, and people who smoke
• People with a dry mouth, from medicines or a condition. A 2024 review in JAMA found dry mouth symptoms in about 23% of people worldwide, and linked a dry mouth to a higher risk of thrush.

Thrush is treated with antifungal medicine, so if your white coating is thick, sore or does not brush off, see a doctor or dentist. If you use an asthma inhaler, rinsing your mouth after each dose helps prevent it.

Bumps on the Back of a Child’s Tongue

Children have the same normal papillae and lingual tonsil as adults, and parents often spot them for the first time while checking a sore throat. Infections that change the tongue are more common in children, though:

• Strep throat: about 3 in 10 children with a sore throat have it, against 1 in 10 adults.
• Scarlet fever: a strep infection with a fever of 101°F or higher, a sore throat and a rough, sandpaper-like rash. The tongue first has a whitish coating, then turns red and bumpy, the “strawberry tongue”.
• Hand, foot and mouth disease: common in children under 5. Mouth sores usually start as small red spots, often on the tongue and inside the mouth, with a rash on the hands and feet. Most children are better in 7 to 10 days.

See a doctor for a child with a sore throat and fever, a strawberry tongue or rash, or who is drinking too little because swallowing hurts.

Can It Be HPV or Cancer?

This is the fear behind many searches, so here is the evidence plainly. The base of the tongue is part of the oropharynx, the back of the throat, together with the tonsils. Cancer there is not common, but it has been rising, and HPV is the reason.

• HPV is now the main cause. The CDC estimates that HPV causes 60% to 70% of oropharyngeal cancers in the US. A study of US cancer registry samples found that HPV-positive oropharyngeal cancers rose by 225% between 1988 and 2004, while those not linked to HPV fell by half.
• It often does not look like a bump. In a review of 184 patients with oropharyngeal cancer, 85% of cases were HPV-positive and 42% started at the base of the tongue. HPV-positive patients were younger, fewer smoked (18%), and the most common first sign was a lump in the neck, alone or with other symptoms in 61%. Their diagnosis took longer, about 15 weeks, partly because the signs are easy to overlook.
• The symptoms to know: a sore throat that lasts, ear pain, a hoarse voice, swollen lymph nodes or a lump in the neck, pain when swallowing, and weight loss without trying. Some people have no symptoms.

HPV can also cause harmless warts, called papillomas, in the mouth: small, painless growths with a bumpy surface. A dentist or doctor can tell these apart.

Put together: a symmetrical row of bumps that has always been there is anatomy, not cancer. What deserves attention is something new and one-sided that does not go away, and especially a neck lump. A US clinical guideline on neck lumps in adults advises treating a persistent neck lump as possibly cancerous until proven otherwise, which simply means it should be examined, not watched. The HPV vaccine protects against the HPV types behind most of these cancers.

How to Get Rid of Them

It depends on what they are:

• Normal papillae and lingual tonsil: nothing to treat, and nothing to remove. Do not scrape, pick at or cut them; that only causes sores and infection.
• Inflamed papillae: they settle on their own within days. Until then, avoid very hot, spicy, acidic or crunchy food, and rinse with warm salt water if it soothes.
• Throat infection: rest, fluids and pain relief for a virus; antibiotics only if a test confirms strep.
• Thrush: antifungal treatment from a doctor or dentist, plus dealing with the cause, such as rinsing after an inhaler or treating a dry mouth.
• Reflux: see a doctor if you have heartburn, a sour taste, frequent throat clearing or a feeling of a lump in the throat.

Gently brushing or scraping the coating from the back of your tongue as part of daily cleaning is fine, and can help with bad breath, but it will not flatten the papillae, because they are supposed to be there. A dentist can check anything you are unsure about at your next visit; it takes them seconds.

When to See a Doctor or Dentist

Based on the NHS guidance on mouth cancer symptoms, see a doctor or dentist if you have:

• A sore or ulcer that has lasted more than 3 weeks
• A lump in your mouth, on your tongue, in your throat or in your neck that is not going away, especially if it is on one side only
• A red or white patch in your mouth
• Pain in your mouth or throat that does not go away, or pain in one ear
• Difficulty swallowing or speaking, or a hoarse voice that does not go away
• A bump that bleeds, or weight loss without trying

Go the same day, or to urgent care, for a sore throat with drooling, trouble breathing or such pain that you cannot swallow liquids, or for a child who is not drinking. If you snore and the lump is the lingual tonsil, mention it: a large lingual tonsil is thought to contribute to sleep apnea.

The Verdict

The bumps at the back of your tongue are almost certainly your circumvallate papillae, foliate papillae and lingual tonsil: normal structures that everyone has and few people notice until they go looking. When they become red, swollen or sore, the usual causes are short-lived irritation of the papillae or a throat infection, and a thick white coating suggests thrush. Cancer at the base of the tongue is uncommon, but because HPV has made it more frequent in younger non-smokers, take a one-sided bump or sore that lasts more than 3 weeks, or a lump in your neck, to a doctor or dentist. For other mouth bumps, see pimple on lip or cold sore and what a cavity looks like. Pale yellow dots on the lips or inside the cheeks are usually Fordyce spots, which are normal oil glands.