Drinking milk stomach flatulence can be mainly caused by lactase deficiency, stomach diseases and post-operative abdominal surgery, it is recommended to actively seek medical advice to clarify the cause and give reasonable treatment. Common causes and treatments 1, lactase deficiency: lactase deficiency, so it can not digest milk and lactose in milk products, will produce abdominal pain, flatulence, diarrhea and other symptoms, the lighter symptoms are not obvious, the more serious can appear bloating, intestinal tinnitus, exhaust, abdominal pain, diarrhea, etc.. It is not advisable to drink milk on an empty stomach, you can drink less or a small number of times, about 50-100 ml each time, with bread and cookies and other foods to improve the symptoms of lactose intolerance, or directly change to drinking yogurt, or use probiotics and other drugs for conditioning; 2, stomach disease: people with basic stomach diseases, gastric acid and pepsin will cause aggression to the epithelium of the gastric mucosa, and milk is rich in calcium components, which calcium ions will stimulate the gastric mucosa to secrete gastric acid, leading to aggravation of stomach diseases, it is recommended to avoid drinking milk, while actively treating stomach diseases; 3, after abdominal surgery: such as after major gastrectomy, dumping syndrome can occur, a large number of oral high-protein foods such as milk, will lead to intestinal flatulence is not easy to digest, it is recommended not to drink milk, available soy milk instead.