Why do painful red bumps keep showing up on your tongue?

Have you ever bitten into something and felt a sudden sting, right on a spot on your tongue that wasn't sore yesterday? These bumps are often lie bumps, tiny structures on your tongue called papillae that become swollen. A canker sore is a different problem, an open sore rather than a swollen papilla. Most of these spots heal, but bumps that last or keep returning should be checked by a physician or a dental provider. 

What you will learn in this article: 

• Lie bumps are swollen tongue papillae that often improve within a few days. 

• Canker sores are different from lie bumps and may take one or two weeks to heal. 

• Irritation and certain foods may be linked to lie bumps, but no single cause has been proven. 

• A painful bump or sore that lasts more than two weeks should be checked. 

If sore bumps on your tongue keep coming back or will not heal, schedule an appointment with an Aspen Dental provider. Your care team can look at the spot, ask about your health history and help figure out what's causing it. 

What are these tiny painful bumps? 

Your tongue is covered with small structures called papillae. Some contain taste buds. Transient lingual papillitis, often called a lie bump, happens when one or more papillae become swollen. 

A small study and literature review published in the Journal of Clinical and Experimental Dentistry found that lie bumps may be red, white or yellow. They can cause pain, burning or tingling. The research found that symptoms often cleared within hours to four days, though they sometimes lasted longer when a larger part of the tongue was inflamed.¹ 

A canker sore is a different problem. The National Institute of Dental and Craniofacial Research describes it as a painful white or yellow sore with a red edge. It forms inside the mouth and may appear on the tongue, gums, cheeks or lips. Canker sores are not contagious.² 

Why do these bumps keep coming back? 

The exact cause of lie bumps is not known. Researchers think more than one factor may be involved. Possible factors include tongue rubbing, a sharp tooth or filling, an orthodontic appliance, stress, poor sleep and spicy or acidic foods. These are possible links, not proven causes. 

Lie bumps can return, but research on repeated cases is limited. In the small study, only one of the eight patients with follow-up information had more flare-ups. The researchers said the follow-up was not strong enough to draw broad conclusions about recurrence.¹ 

Canker sores have different possible triggers. These may include a mouth injury, hormone changes, emotional stress, quitting smoking and low levels of folic acid, iron or vitamin B12. Reports about these triggers vary.² 

Shifting red patches that create a map-like pattern may be a separate condition called geographic tongue rather than a lie bump. 

How long do painful tongue bumps last? 

Lie bumps often improve within a few days. Some may last longer if several papillae are swollen. Canker sores tend to heal within one or two weeks. 

Have the area checked if it is not getting better, lasts longer than two weeks or keeps returning in the same spot. 

What can you do to feel better at home? 

Try to avoid anything that rubs or irritates the sore area while it heals. These steps may help: 

• Choose cool, soft foods. 

• Avoid hot, spicy or acidic foods if they sting. 

• Do not bite, squeeze or scrape the bump. 

• Brush your tongue with care. 

• Drink water to keep your mouth moist. 

If the spot may be a canker sore, a nonprescription numbing gel may ease the pain. Ask your Aspen Dental provider or pharmacist before using a medicated mouth rinse or gel, especially for a child. 

When should you see a dentist about tongue bumps? 

A short-lived lie bump is often not a reason for concern. However, a sore, irritated area, lump, thickened spot or red or white patch should be examined if it remains for more than two weeks. Pain, bleeding, numbness or trouble moving your tongue are other signs that should not be ignored.³ 

You should also get checked if: 

• The bumps or sores keep returning. 

• The pain makes it hard to eat, drink or talk. 

• The area becomes larger or starts bleeding. 

• You develop fever, a rash or swelling in your jaw or neck. 

• You have numbness or trouble moving your tongue. 

If the problem begins with a sore tooth and includes swelling or a red streak along your jaw or neck, seek prompt dental care. 

Frequent canker sores may also be linked to a nutrient shortage or a condition such as celiac disease. Your dental provider may suggest talking with your doctor about testing. 

Could it be something more serious? 

Most lie bumps and canker sores are not serious. Still, different mouth conditions can look alike. A dental provider can examine the location, shape and color of the spot and ask about other symptoms. 

Get prompt care if tongue pain occurs with trouble breathing or swallowing. Tooth pain paired with new numbness or tingling in your face also needs an exam. 

Painful bumps that keep returning deserve a clear answer. Contact your local dental provider to have the area checked and discuss what to do next. 

Why do painful red bumps keep showing up on your tongue? FAQs 

Still have questions about painful tongue bumps? These answers cover a few common concerns. 

Do canker sore treatments also work on lie bumps? 

Not always. A numbing gel may ease canker-sore pain, but it will not identify or remove the cause of a lie bump. Do not use a steroid product unless a provider prescribes it. 

Can stress really cause bumps on my tongue? 

Stress is one possible factor linked to lie bumps and canker sores, but it does not prove what caused yours. Look for other patterns, such as tongue rubbing, poor sleep or certain foods. 

Should I stop eating spicy food if I keep getting these bumps? 

Spicy and acidic foods may irritate a sore tongue. If you notice bumps or pain after eating them, cut back and see whether that helps. 

Can a dental provider tell me exactly what is causing my tongue bumps? 

An Aspen Dental provider can often narrow down the cause by examining the spot and asking how long it has been there. If sores keep returning, your provider may suggest blood tests or a visit with your doctor. 

Sources 

¹ National Institutes of Health, PubMed Central, Journal of Clinical and Experimental Dentistry: “Transient lingual papillitis: A retrospective study of 11 cases and review of the literature.” https://pmc.ncbi.nlm.nih.gov/articles/PMC5268094/ 

² National Institute of Dental and Craniofacial Research, Health Info: “Fever Blisters & Canker Sores.” https://www.nidcr.nih.gov/health-info/fever-blisters-canker-sores 

³ National Institute of Dental and Craniofacial Research, Health Info: “Oral Cancer.” https://www.nidcr.nih.gov/health-info/oral-cancer