Drinking milk when I was a child is fine. What happened to diarrhea when I grew up?

When you drink milk as a child, it is OK. When you grow up, diarrhea may be caused by lactose intolerance, allergic reactions, intestinal inflammation and other reasons.

1. Lactose intolerance

With age, lactase secreted by some people's intestines may decrease, leading to lactose intolerance. When drinking milk, diarrhea, abdominal distension and other symptoms may occur.

2. Allergic reactions

Some people may be allergic to certain ingredients in milk, such as casein, whey, etc., which will cause allergic reactions and diarrhea after drinking milk.

3. Intestinal inflammation

Some people may suffer from intestinal inflammation, such as Crohn's disease, which will reduce the digestive ability of the intestines to milk, resulting in diarrhea.