Usually diarrhea occurs during menstruation, mostly due to inflammatory infection or irregular diet, acute enteritis caused by eating unclean food or undigested food. In many cases, 1. first, pay more attention to rest and drink as much water as possible to prevent electrolyte disorders. 2. second, give symptomatic support treatment. If the symptoms are still not relieved, it is best to improve the routine stool examination and blood test to clarify whether there is inflammatory infection. If accompanied by fever, nausea, vomiting and other characteristics of inflammatory infection, you need to give norfloxacin capsules, 2 capsules once, 2-3 times a day; compound aminobarbital injection once 2ml intramuscular injection, symptomatic support treatment.