Taking probiotics usually does not cause diarrhea. Probiotics are mainly used to maintain the balance of intestinal flora, promote food digestion and absorption, protect the intestinal mucosal barrier, inhibit intestinal inflammation, and enhance the body’s immunity, etc. They are generally used in the treatment of intestinal flora disorders, and usually do not cause diarrhea. If diarrhea occurs after taking probiotics, it is mostly related to food poisoning, functional dyspepsia, irritable bowel syndrome and acute gastroenteritis. All of these drugs are contraindicated in people who are allergic to them and should be taken in accordance with medical advice. If the patient takes probiotics after diarrhea, should immediately stop the drug, it is recommended to go to the regular hospital in a timely manner, clear cause, under the guidance of the doctor for targeted treatment.