Diarrhea is also known as diarrhea. Diarrhea after drinking milk may be caused by lactose intolerance, milk protein allergy, irritable bowel syndrome, etc. It can be dealt with by replacing the milk powder or adding lactase enzyme, forbidding high-protein diets, or medication such as montelukast, loperamide, and so on. 1. Lactose intolerance: drinking milk after diarrhea may be intestinal lactase deficiency, lactose can not be broken down by the body, absorption, will cause diarrhea symptoms. You can use lactose-free milk powder or low-lactose milk powder instead, you can also add lactase enzyme substitute to avoid diarrhea. 2. Milk protein allergy: patients with milk protein allergy, after contact with milk, immature immune system to milk protein as a harmful substance, triggering the body intense allergic reaction, diarrhea symptoms, usually prohibit high-protein diet, do not eat eggs, milk, dairy products, egg products, food, diarrhea is serious, give Bacillus subtilis bacillus capsules, montelukast and other medications. 3. Irritable bowel syndrome: Irritable bowel syndrome is a group of persistent or intermittent episodes, accompanied by abdominal pain, diarrhea, defecation habits change a functional gastrointestinal tract lesions, these patients should be adjusted to life, irregular work and rest or emotional anomalies are likely to stimulate the intestinal tract, intestinal peristalsis irregularity or spasm, triggering the symptoms of diarrhea, usually have to develop a good habit of life, maintain emotional stability. The seriousness of the diarrhea is treated with loperamide. After drinking milk on the diarrhea causes more, serious advice timely medical treatment, follow the doctor’s instructions for treatment.