Having diarrhea while having your period is not much different from the usual treatment. First of all, it is to eat a light diet or fasting, and it is recommended to try to eat easily digestible food without fat, such as white rice and thin rice, vegetables and so on. Then to use medication, it is recommended to do stool routine first to rule out intestinal bacterial infection. If the diarrhea is caused by simple intestinal dysfunction, you can take drugs to regulate intestinal function, such as Simethicone, bifidobacteria and so on. If the diarrhea is particularly serious, the patient needs to be hospitalized for infusion treatment, because diarrhea is more serious, it may lead to electrolyte disorders.