Lactose is decomposed and digested by the small intestine. Some adults are lactose intolerant due to lactase deficiency or insufficient activity, and generally experience symptoms of gastrointestinal discomfort such as bloating, abdominal pain and diarrhea. For the treatment of lactose intolerance symptoms in adults, the following methods are available: 1. develop dietary habits: avoid eating dairy products on an empty stomach, as lactose intolerance can easily occur when taken on an empty stomach; 2. control the intake of lactose: do not drink lactose-containing dairy products in daily life, and replace them with fermented yogurt and unsweetened milk; 3. seek medication: when the patient has severe lactose intolerance symptoms, with severe nausea, vomiting, abdominal pain and other symptoms and When patients have serious lactose intolerance symptoms, such as severe nausea, vomiting and abdominal pain, and cannot recover on their own for a long time, they need to seek medical attention and take drugs such as gastrofacial tablets and montelukast under the guidance of doctors.