Drinking pure milk stomach bloating may be drinking cold pure milk or too fast and other dietary improprieties, lactose intolerance, gastric ulcers and other reasons. 1. Improper diet: If you drink cold pure milk, it stimulates the gastrointestinal tract to slow down peristalsis. Food accumulation produces gas will appear stomach bloating. Drinking too fast, air into the stomach, may also appear stomach bloating. You can drink warm milk, small sips slowly. 2. Lactose intolerance: Pure milk contains a large amount of lactose, which needs to be digested and absorbed under the action of lactase. If there is a lack of lactase or a relative insufficiency of lactase, due to lactose intolerance, the lactose will ferment in the intestines and produce gas, which may lead to bloating. You can drink a small amount of pure milk and avoid drinking too much at once. 3. Gastric ulcer: Pure milk is rich in protein, gastric ulcer patients usually have weakened digestive function, the secretion of digestive enzymes and other substances to reduce the accumulation of food to produce gas may appear bloating. Excluding eating too fast and other physiological reasons, often appear to drink pure milk stomach bloating should be timely consultation, under the guidance of the doctor to identify the cause, and reasonable treatment.