Thigh root pain in women is first considered to be caused by inflammatory infections, such as adnexitis and pelvic inflammatory disease, which is mostly seen in women of childbearing age, and the pain is on one side or both sides, accompanied by an increase in leukorrhea. If the gynecological inflammation is chronic, the pain will be vague, accompanied by lumbar pain, abdominal distension, and some may have fever symptoms. The second situation is the pain caused by the menstrual cycle, the virgin in the menstrual cycle, because the body of some hormonal changes will cause pain sensitivity, this situation is also manifested as dysmenorrhea, generally and menstrual cycle related, after a period of time after the pain will disappear naturally. Also need to rule out the existence of endometriosis, but also to see if there is the possibility of ectopic pregnancy.