Congenital lactose intolerance cannot be cured by itself, while secondary lactose intolerance can be cured by itself. 1. Congenital lactose intolerance: Lactose intolerance refers to the inability to digest lactose, resulting in diarrhea and bloating after eating foods containing lactose. Congenital lactose intolerance is the inability to digest and absorb lactose in the intestines due to a congenital deficiency of the enzyme lactase, and is usually not self-curable. 2. Secondary lactose intolerance: secondary lactose intolerance is due to acquired infection or the use of drugs and other conditions leading to intestinal mucosal damage, so that the small intestinal epithelium of the absorption and digestion of the obstacle, after active treatment of the primary disease, the small intestinal villi can be repaired. If protein malnutrition is present, lactase-activated supplements can be used to increase lactose secretion, which can lead to gradual recovery of secondary lactose intolerance. When lactose intolerance is detected, it is recommended to consult the gastroenterology department of a regular hospital for diagnosis.