Some people are born with skeletal problems that prevent them from biting normally. This “bad bite” can be in the form of an under-bite, an over-bite or an open bite. Also known as severe malocclusion, the deformity can cause difficulties with chewing food properly (which affects digestion), speech problems, headaches and joint pain. It can also compromise a person’s appearance, especially their profile. To correct a bad bite, the jaw can be realigned in adults by surgery.