The causes of diarrhea in the heat of the day are: 1, diarrhea in the heat of the day is most likely because of heat stroke, because of the heat, resulting in electrolyte disorders in the body, and then the clinical manifestations of diarrhea; 2, if the clinical symptoms of diarrhea appear in the heat of the day, there may also be because of the heat of the day, the food eaten is not clean, not fresh, unclean diet, resulting in acute gastroenteritis, and then diarrhea, abdominal pain Symptoms; 3, hot diarrhea may also be due to normal physiological conditions, if the number of stools for 2-3 times a day, and the stool is yellow formed soft stool, then it is a normal physiological phenomenon. In short, there are many reasons for hot diarrhea, which may be due to electrolyte disorders, acute gastroenteritis, physiological conditions, etc.