When women experience particularly intense pain after menstruation, it is caused by contraction of the smooth muscle inside the uterus, which stimulates the visceral nerves. Most of them do not have organic problems. It is not excluded that there are organic problems such as pelvic inflammatory disease or endometriosis, and it is important to clarify the cause before using medication. For such patients, if menstrual pain occurs once a month and more than three times in six months, it is recommended to go to the hospital for such tests as uterine ultrasound or gynecological ultrasound and to draw blood for laboratory tests with non-steroidal painkillers. The pain is not only localized to the nerve, but also to the hormone level of the woman. If the pain is severe, these organic problems can be ruled out, as well as stimulating factors, and there are also problems with muscle smooth muscle contraction. You can use antispasmodic drugs, such as atropine or 654-2, etc. Therefore, it is recommended that patients go to the hospital to see a doctor to clarify the cause before using drugs.