Aunt refers to menstruation, and there is no action to relieve pain when menstruation occurs. Pain when menstruation occurs is considered to be primary dysmenorrhea and secondary dysmenorrhea. 1. Primary dysmenorrhea: primary dysmenorrhea is related to the increase in prostaglandin levels in the endometrium during menstruation. Prostaglandin causes excessive contraction of the uterine smooth muscle and vascular spasm, resulting in ischemia of the uterus and lack of oxygen, which leads to dysmenorrhea, and the movements do not improve the levels of prostaglandin, nor does it improve the dysmenorrhea. 2. Secondary dysmenorrhea: secondary dysmenorrhea refers to dysmenorrhea caused by some diseases, the more common ones are endometriosis and adenomyosis, etc. It is due to the endometrium grows outside the uterine body or the endometrial glands and mesenchyme invade into the uterine myometrium, etc. It is impossible to lift the cause of the disease by doing the movement, and it can’t improve the dysmenorrhea symptom, so it is necessary to treat under the guidance of the doctor. Painful menstruation needs timely medical attention to clarify the cause of dysmenorrhea, and then targeted treatment, if it is caused by disease to be actively treated, do not delay the condition.