When this phenomenon occurs, it can be treated through abdominal hot compress massage, taking painkilling drugs, which may be due to the patient’s intolerance to lactose and the existence of allergies. When you have a stomachache after drinking milk, you can take warm water or hot compresses to relieve the treatment, gently rub the abdomen with your hands to promote intestinal peristalsis, to promote digestion and absorption as soon as possible, so as to achieve the effect of pain relief, in serious cases it is recommended to take painkilling drugs or go to the hospital for IV treatment. If you are allergic to lactose, you should pay attention not to touch lactose-based foods, and if you are intolerant, you can take a small amount of dairy products each time to let your stomach and intestines slowly adapt, and you can take drugs to promote lactase activity to assist gastrointestinal digestion. If you have a stomachache after drinking milk, take different measures to treat and relieve it according to the severity of the situation.