6. Oral hairy leukoplakia
Oral hairy leukoplakia is an infection that appears in the mouth as white lesions on the bottom or sides of the tongue.
It may be one of the first signs of HIV/AIDS. The infection causative agent is the Epstein-Barr virus.
It do not cause pain or discomfort, so they are usually not treated. The condition resolves on its own, but can recur frequently.
If necessary, oral hairy leukoplakia can be treated with aciclovir, an anti-viral medication that treat sherpes.