Body piercing is a popular form of self-expression. Oral piercings or tongue splitting may look cool, but they can be dangerous to your health. That’s because your mouth contains millions of bacteria, and infection and swelling often occur with mouth piercings. For instance, your mouth and tongue could swell so much that you close off your airway or you could possibly choke if part of the jewelry breaks off in your mouth. In some cases, you could crack a tooth if you bite down too hard on the piercing, and repeated clicking of the jewelry against teeth can also cause damage. Oral piercing could also lead to more serious infections, like hepatitis or endocarditis.