Question: My tongue is always sore on one side. What do you think could be causing this? My dentist says I don't have any infection or sign of cancer.
Dr. Hibberd's answer:
Soreness on one side of your tongue in the absence of infection or tumor is usually due to trauma (burn, chemical or physical) or infection. Vitamin C deficiency and B12 deficiency are also associated with tongue irritation.
Perhaps you grind your teeth when asleep and bite your tongue in the process? It's possible you may also have a mild seizure disorder that can cause this without you knowing it.
Localized inflammation from a non-visible infection is possible, but that will usually produce a sore, ulcer or red area with swelling. I would recommend you have this examined by your doctor for more specific management. Remember that a yeast infection in the mouth of an adolescent or adult is now a recognized reason to have your HIV test checked.
© 2026 NewsmaxHealth. All rights reserved.