The first thing to consider is irritable bowel syndrome, and other gastrointestinal diseases, such as enteritis and gastritis, should be ruled out. 1. irritable bowel syndrome: abdominal discomfort, bloating, abdominal pain with changes in bowel habits as the main symptoms, can be manifested as eating abdominal pain and diarrhea. Treatment includes medication, diet and improvement of poor lifestyle, and those with severe symptoms may need psycho-behavioral treatment. Commonly used therapeutic medications include antispasmodics such as pivelonium bromide, atropine, belladonna combination, etc., laxatives such as methylcellulose, polyethylene glycol, lactulose, etc., antidiarrheal medications such as loperamide or compound phenylephrine, and prokinetics such as mosapride and itopride. At the same time, you should avoid foods that can easily cause allergies, excessive fat and stimulating diets such as coffee, strong tea and alcohol. Avoid eating gas-producing foods such as dairy products, beans, etc., and high-fiber foods such as bran, leeks, etc., to avoid stimulating intestinal peristalsis and aggravating diarrhea. 2. Enteritis: acute enteritis mainly manifests as nausea, vomiting and diarrhea, while chronic enteritis clinically manifests as long-term chronic or recurrent abdominal pain, diarrhea and indigestion, etc., and in severe cases, mucus stools or watery stools. Both acute and chronic enteritis can present with painful eating stomach and diarrhea. Treatment should pay attention to replenishing fluids and correcting electrolytes and acidosis. For mild dehydration and vomiting, oral rehydration can be given, and for dehydration or vomiting, intravenous saline, isotonic sodium bicarbonate and potassium chloride solution and glucose can be given as symptomatic treatment. Drugs to reduce intestinal peristalsis and secretion can also be used under the guidance of a doctor, pain relief and diarrhea can be applied in small amounts of atropine, belladonna, prudence and other drugs; 3, gastritis: manifested as abdominal discomfort, epigastric pain, bloating, nausea and vomiting, decreased appetite, eating stomach pain diarrhea, etc.. Treatment should pay attention to dietary hygiene and regular diet. For people suffering from chronic liver and gallbladder disease, diabetes, duodenogastric reflux, gastric mucosal blood circulation disorders and other diseases, the primary disease should be actively treated. Drug treatment can be used to inhibit gastric acid secretion and gastric mucosal protective agents, such as omeprazole, cimetidine, colloidal bismuth subcitrate, etc.