An oral mouth piercing is a small hole in your tongue, lip, cheek, or uvula (the tiny tissue that hangs at the back of your throat) where you can wear jewelry. You can get a piercing on the inside of your mouth (intraoral) or the type that you can see outside of your mouth (perioral). piercing sites for jewelry placement include the lips, cheeks, frenum (a fold of mucous membrane and soft tissue extending from the floor of the mouth to the mid line of the under surface of the tongue) and uvula.