The principal manifestation of<unk>  is an adverse reaction to products containing<unk>  (primarily milk), including abdominal bloating and cramps, flatulence, diarrhea, nausea, borborygmi, and vomiting (particularly in adolescents). These appear one-half to two hours after consumption. The severity of these signs and symptoms typically increases with the amount of<unk>  consumed; most<unk> -intolerant people can tolerate a certain level of<unk>  in their diets without ill effects.
Lactose intolerance
Appendix cancer
Sucrose intolerance
Gastroenteritis
Fructose malabsorption
Microscopic colitis
Glucose-galactose malabsorption
Saccharopinuria