Sex does not relieve dysmenorrhea, because the causes of dysmenorrhea are mainly the following: 1. primary dysmenorrhea, mainly because the endometrium shedding when menstruation will produce a large amount of prostaglandins, and prostaglandin stimulation can cause uterine contraction, resulting in pain in the lower abdomen. 2. secondary dysmenorrhea, secondary dysmenorrhea is often caused by endometriosis, or inflammation of the pelvis caused by dysmenorrhea, or abnormal development of the uterus caused by dysmenorrhea. The reason for this is that it is not the only way to relieve dysmenorrhea. Menstrual pain is not relieved by sexual intercourse, but is treated differently depending on the cause. If a woman is not planning to get pregnant, she should take good contraceptive measures to avoid the possibility of pelvic inflammatory disease or endometriosis caused by abortion.