Under the tongue is a common spot for canker sores (shown here) -- small, painful, reddish bumps that come and go on their own. A single, painful bump at the.
Plica fimbriata refers to the small folds in the membrane on the underside of your tongue. The folds tend to run parallel to, and on either side of.
A canker sore is another common cause of pain on or under the tongue. This is a small, white or yellow sore that can occur for no apparent reason. Canker sores.