Dysmenorrhea is one of the most common gynecological symptoms, which refers to pain and swelling in the lower abdomen before and after menstruation or during menstruation, accompanied by back pain or other discomfort. Primary dysmenorrhea refers to dysmenorrhea without organic lesions in reproductive organs, accounting for more than 90% of dysmenorrhea; secondary dysmenorrhea refers to dysmenorrhea caused by pelvic organic diseases, such as uterine fibroids, endometriosis, pelvic inflammatory disease, etc.