If there is abdominal pain during menstruation, abdominal distension and pain are the main symptoms below. This is caused by uterine contraction, which shows a certain regularity and can effectively promote the disintegration, shedding and bleeding of endometrium. This is a normal performance, and it is necessary to effectively inhibit the pain caused by uterine contraction through massage and hot compress. On the other hand, it may be caused by gastrointestinal diseases. Observe whether there are diarrhea, nausea and vomiting and other uncomfortable symptoms. If the pain is caused by uterine contraction, it can be effectively alleviated by taking non steroidal antipyretic, analgesic and anti-inflammatory drugs, or blood activating and stasis removing pain relieving drugs.