teeth cutting tongue
Trauma to the lips, tongue and the inside of the mouth is quite common. The soft flesh of the lips and their exposed location make them vulnerable to injury. A blow to the face can crush your lips against your teeth, causing bruising or cuts. Your teeth can cut the inside of your lip or puncture your skin. A fall or blow may cause you to bite your tongue. Any cut inside the mouth usually bleeds heavily because of the rich supply of blood to the area.