Abdominal pain and diarrhea after meals may be caused by food poisoning, irritable bowel syndrome, acute enteritis and other diseases, and can be treated by emetic, medication (such as scopolamine, norfloxacin, etc.) as prescribed by the doctor. 1. Food poisoning: Eating toxic food or food contaminated by bacteria or bacterial metabolites can cause food poisoning, resulting in abdominal pain and diarrhea for several hours after the meal, accompanied by dizziness, nausea and other symptoms. Should immediately seek medical attention, under the operation of the doctor, vomiting, gastric lavage and diarrhea, as a way to remove the residual poison in the gastrointestinal tract, if dehydration is serious, should be rehydration, abdominal pain is obvious, can be applied to antispasmodic drugs such as scopolamine. 2. Irritable bowel syndrome: is caused by food factors, intestinal infections and other factors, patients often appear after meals or before defecation abdominal pain, and will be accompanied by abnormal bowel movements, that is, diarrhea, constipation and so on. If the abdominal pain is serious, scopolamine and mebeverine can be taken orally, and if the diarrhea is serious, montelukast can be taken. 3. Acute enteritis: mostly caused by bacterial and viral microbial infections, patients will suddenly develop diarrhea, abdominal pain and other symptoms within a few hours after eating, and may be accompanied by vomiting and fever. Patients should fast for a short period of time and use montelukast to protect the intestinal mucosa; apply difenocoumarol to stop diarrhea; use belladonna and atropine in moderation to relieve pain. If caused by bacterial infection, norfloxacin, amoxicillin, cefuroxime, etc. should also be used. In addition, there are many other reasons that can cause abdominal pain and diarrhea after meals, it is recommended to go to the hospital in time.