Leukoplakia is a physical disorder that shows up as thick, white or gray patches with a hard, raised surface on or under your tongue, the inside of your cheeks, or on your gums. It is usually not painful nor is it usually a serious condition.
Leukoplakia often goes away on its own. However, your doctor or dentist might prescribe an anti-viral medication or a topical retinoic acid-containing ointment. Leukoplakia is typically caused by smoking, chewing tobacco, or an injury such as biting your cheek or gum or dentures that don’t fit properly. In rare cases in may be linked to oral cancer in which case it should be treated without delay.