causes of blackhead inside mouth?!

Best Answer - Chosen by Voters

Blackheads are a problem in the hair follicle. There are no hair follicles in the mouth. There are glands and openings to glands so there may be something stuck in a gland opening. There can be other causes of dark spots in the mouth. The dentist, primary doc or dermatologist can evaluate it.

I didn't know that was possible

Sounds like herpes to me.....