Dysmenorrhea is one of the most common gynecological symptoms, which refers to lower abdominal pain, cramping, accompanied by back pain or other discomfort that appears during or before menstruation and worsens during menstruation, and affects the quality of life in severe cases. Perhaps you have looked for many prescriptions to relieve dysmenorrhea, but the most important thing is to go to the hospital for a standardized examination to find out what causes dysmenorrhea. Dysmenorrhea is divided into primary dysmenorrhea and secondary dysmenorrhea. Primary dysmenorrhea refers to dysmenorrhea that has been present since the beginning of menstruation and has no functional or substantial lesions of the reproductive organs, causes include uterine dysplasia, narrow uterine orifice, or menstrual blood with a large piece of endometrium. This kind of dysmenorrhea occurs mostly in adolescent women and unmarried women, and most primary dysmenorrhea can be relieved after childbirth. Most secondary dysmenorrhea is caused by substantial lesions in the uterus or organs of the reproductive tract and is caused by diseases, commonly including pelvic inflammatory disease, endometriosis, and pelvic congestion. This year, it was found that an increase in prostaglandins synthesized by the endometrium can also cause dysmenorrhea. Therefore, understanding the cause of the occurrence of dysmenorrhea, it is possible to view the uterus and adnexa through ultrasound examination; after excluding substantive organ lesions, early diagnosis of intrapelvic organ lesions can be made and early symptomatic treatment can be provided. Therefore, ultrasound is widely used in clinical practice as a common diagnostic tool for diagnosing the causes of dysmenorrhea. If you have symptoms of dysmenorrhea, make sure to go to the hospital for standardized examination and treatment. Don’t ignore the danger of dysmenorrhea because of its widespread nature, and follow the doctor’s advice to regulate your body. Follow the doctor’s advice to regulate your body. Targeted treatment according to different causes.