Tooth damage and gum disease can be the result of eating disorders like bulimia and anorexia.
A practicing anorexic person is depriving their body of vital nutrients needed for strong healthy bones. This can lead to osteoporosis and weaken bones that support the teeth and softening of tooth enamel.
Bulimics practice compulsive overeating and regurgitating. Acids from the stomach passing through the mouth rapidly damage to tooth surfaces which leads to discolouration and chipping.