Most common problem that people get with tongue piercing is fractured teeth. This usually occurs while eating, sleeping, talking or chewing on the jewelry. When a tooth fracture occur it could be as minor a small filling to repair or it may need a root canal or tooth extraction depending on the extent of the fracture.
Other complications that can occur:
Swelling of the tongue could occur during the puncturing of the tongue which can lead to one's airway being cut off.
Infection can occur since the tongue is covered with natural bacteria that can be introduce into the body's blood stream during the puncturing of the tongue. There is also a risk of getting HIV or hepatitis from those who may be during the piercing if the needle is not fresh or new. There are places that reuse their needle, if they do they need to make sure the needle use is sterilize in extreme heat by an autoclave
Care for your Oral Piercing:
Removing your oral piercing when you are eating and sleeping
Clean your piercing everyday with a brush just like you would with your teeth.