The most important thing to treat diarrhea is to prescribe the right medicine. Diarrhea can be divided into infectious and non-infectious diseases. Infectious diarrhea is caused by pathogens such as bacteria, viruses, fungi and parasites, such as bacillary dysentery, bacterial food poisoning and viral enteritis. Non-infectious diarrhea is common in colds, indigestion, gastrointestinal dysfunction and systemic diseases such as hyperthyroidism, diabetes and uremia. Infectious diarrhea is a manifestation of human self-protection, which can excrete some toxins and is beneficial to human body. If diarrhea is stopped blindly, it will be unfavorable to the prognosis of the disease. In principle, antidiarrheal drugs are only suitable for non-infectious diarrhea, and infectious diarrhea is generally not used, especially in acute stage, when inflammation and poisoning symptoms (such as high fever) are obvious and purulent stool is more, it should be regarded as an absolute taboo for antidiarrheal drugs; In the recovery period, the condition improved obviously and there was no pus in the stool. Only with more water, you can also take antidiarrheal drugs for a short time.