Having diarrhea after drinking boiled water may be related to the patient’s own presence of intestinal inflammation or indigestion and so on. After drinking hot water, the heat will stimulate the intestinal mucosa, if the patient suffers from intestinal inflammation or indigestion and other diseases, it is easy to lead to intestinal and smooth muscle spasm, and then diarrhea, stomach pain and other symptoms. Patients should pay attention to not drinking water with too high temperature, not eating food with too high temperature or too low temperature in daily life, and should eat food with appropriate temperature; meanwhile, they should avoid stimulating food such as spicy and greasy food, so as not to increase intestinal irritation. If the patient’s symptoms of diarrhea are serious or persist without improvement, it is recommended to go to the hospital in time, to clarify the cause of the disease, and then carry out targeted treatment under the guidance of the doctor to minimize the adverse effects of the disease.