Diarrhea every afternoon may be caused by improper diet, no treatment is needed, it is recommended to adjust the diet. It may also be caused by chronic enteritis, dyspepsia and other diseases, patients can take medication. 1. Improper diet: If the patient at noon every day to eat too greasy food, such as fat meat, lard, etc., will lead to the phenomenon of diarrhea every afternoon, is a physiological phenomenon, usually do not need treatment. It is recommended that patients adjust their diets and eat light foods, such as rice porridge, green vegetables, steamed bread and so on. 2. Chronic enteritis: chronic enteritis is caused by recurrent episodes of acute enteritis, patients will have diarrhea, abdominal distension, abdominal pain and other symptoms, so patients will have diarrhea every afternoon. Patients can take oral antibiotics such as cefaclor tablets and roxithromycin capsules as prescribed by the doctor, as well as antispasmodic and analgesic drugs such as atropine sulfate tablets and scopolamine tablets. In addition, patients with severe diarrhea, patients can also be prescribed oral montelukast. 3. dyspepsia: dyspepsia is mainly characterized by abdominal pain, bloating, diarrhea, etc., so the patient will have diarrhea every afternoon. Patients can take oral ranitidine capsules, famotidine tablets and other drugs to inhibit gastric acid secretion as prescribed by the doctor. In addition, patients can also follow the doctor’s instructions to take oral compound digestive enzyme capsules, compound azinmitic enteric-coated tablets and other digestive enzyme preparations. When patients have the symptom of diarrhea every afternoon, it may also be caused by Crohn’s disease, ulcerative colitis and other diseases. Patients should seek prompt medical attention and follow the doctor’s instructions for treatment.