Stomach pain and diarrhea are usually considered to be caused by gastrointestinal dysfunction, and are generally considered to be caused by acute gastroenteritis, gastrointestinal flu, and indigestion. In this case, you should go to the gastroenterology department in time to identify the causes and treat them accordingly. Common causes and treatment 1, acute gastroenteritis: mostly caused by unclean diet, overeating, eating too much cold or spicy irritating food. Bacterial acute gastroenteritis can choose cephalosporin or levofloxacin treatment, viral acute gastroenteritis can choose ranitidine, omeprazole, thioglycollate and other antispasmodic pain relief; 2, gastrointestinal cold: mostly virus-induced inflammation of the gastrointestinal tract, the symptoms are similar to acute gastroenteritis. Attention should be paid to replenish water and electrolytes, to ensure the acid-base balance in the body, through bed rest can generally recover on its own; 3, indigestion: commonly due to increased secretion of gastric acid, reduced secretion of digestive factors and enzymes, H. pylori infection and other factors. Treatment should be clear cause before symptomatic treatment, such as excessive secretion of gastric acid, can be neutralized by magnesium aluminum carbonate, aluminum thioglycollate, etc., to reduce symptoms; Helicobacter pylori infection requires the use of penicillin, clarithromycin and other antibacterial drugs, combined with acid suppressants, bismuth agents for treatment. Note: People with stomach pain and diarrhea should try to eat a light diet in daily life, avoid eating too much greasy, cold, spicy and stimulating food, pay attention to dietary hygiene, and seek medical treatment promptly if symptoms persist and cannot be relieved.