In the case of diarrhea after vaccination, you can take medication, preliminary consideration is the rejection reaction of the vaccine, caused by abdominal pain, diarrhea symptoms, you can temporarily observe, if you continue to have diarrhea, to take antidiarrheal medication for treatment, you can take montelukast powder, has a very good curative effect. During this period, we must pay attention to the diet, to light, easy to digest the main, drink more warm water for gastrointestinal relief and regulation, do not eat greasy, spicy and stimulating food, to avoid a certain burden on the stomach and intestines, you can use a small amount of meals, so that the stomach and intestines to gradually restore the balance of the state, and to maintain a good life and work routine. When the situation is serious, such as the rejection of the vaccine allergic reaction, caused by abdominal pain, diarrhea, need to go to the hospital in time for further treatment.