If you are lactose intolerant, you should stop drinking lactose-containing milk and use lactase-containing medication to relieve the symptoms. 1. Stop drinking lactose-containing milk: If lactose intolerance occurs after exposure to lactose-containing milk, you should stop drinking lactose-containing milk immediately, and you can choose to drink low-lactose or lactose-free milk instead. You can also choose to drink fermented yogurt to supplement nutrition. 2. Lactase drug: lactose intolerant people will have diarrhea, abdominal pain and other uncomfortable symptoms in the short term after exposure to lactose, so after the occurrence of uncomfortable symptoms can be appropriate oral lactase to effectively metabolize the lactose component of the body, so as to alleviate the adverse gastrointestinal reaction. In addition, you can choose lactose-free dairy products such as yogurt and condensed milk to avoid diarrhea and other discomforts.