Causes of diarrhea and upset stomach include improper diet, cold abdomen and acute gastroenteritis. For diarrhea, upset stomach for three days, need to immediately stop diarrhea, eliminate the infection and control the diet. 1. Improper diet: If you have recently eaten a lot of greasy, spicy food can lead to diarrhea, upset stomach, need to control the diet, such as eating light, easy-to-digest food such as rice pudding, vegetable puree and thin noodles. It is strictly prohibited to give the patient to eat like fried chicken, chili and ice cream and other greasy, spicy or cold food, which will aggravate the burden on the gastrointestinal tract and is not conducive to the recovery of the disease. 2. Acute gastroenteritis: unclean diet will lead to diarrhea, upset stomach, we must immediately take measures to stop diarrhea, anti-infection and other treatments to prevent patients from severe dehydration, electrolyte disorders, infectious shock and other phenomena. You can follow the doctor’s instructions to take antidiarrheal drugs such as perotonin hydrochloride capsules, montelukast and other anti-infective drugs and ornidazole. 3. Abdominal cold: abdominal cold can also appear diarrhea, diarrhea, patients should pay attention to the daytime more clothes, strengthen the gastrointestinal tract warmth. Cover up at night, do not let the abdomen cold. There may be other reasons for diarrhea, upset stomach, it is recommended to consult a doctor in time, actively cooperate with the professional doctor’s treatment, do not delay.