Lactose intolerance is the inability to digest lactose, which is a type of sugar found in milk and dairy products. Lactase is the enzyme that digests lactose. Some people lack the ability to produce lactase and some people produce very little of it.
The symptoms would be like abdominal pain, cramping, bloating, diarrhea, gas, those are the symptoms. Let's say you avoid milk and dairy products for two weeks and your symptoms go away, then most likely you have lactose intolerance. Then what you can do is slowly reintroduce lactose in your diet and see how much you can tolerate.
