Summer diarrhea can be caused by eating too many cold drinks, unhygienic diet, environmental factors, infectious diarrhea and other reasons. 1. Eating too many cold drinks: If you eat more cold drinks and cold food in the summer heat, it may lead to indigestion, causing gastrointestinal tract dysfunction, and diarrhea symptoms will occur. 2. Unhygienic diet: in the hot summer, many people like to eat some barbecue at roadside stalls, if the processing is not hygienic or the food cooking time is not enough, it may lead to the growth of germs, diarrhea phenomenon. 3. Environmental factors: When the weather is hot in summer, many places have air conditioners, if the temperature is too low and no attention is paid to keep warm, you may get cold and diarrhea is induced. 4. Infectious diarrhea: summer weather is hot, conducive to the growth of various pathogenic microorganisms, eating food contaminated by pathogens may lead to infectious diarrhea. Summer diarrhea, there are other reasons, such as heatstroke, etc., it is recommended that patients should go to the hospital in a timely manner, relevant examinations, clear cause of the disease, and then follow the doctor’s instructions for treatment.