Low back pain and whether or not your period comes are two different things. Low back pain is mainly caused by stimulation of the nerves and blood vessels in the lower back, but of course this stimulation can come from menstrual cramps or inflammation of the adnexa, etc. and is not necessarily linked to it. Menstruation is a normal physiological function for girls, and there may be uncomfortable situations such as menstrual cramps, some of which are occasionally associated with back pain. When they are not linked, for example, due to recent strain, causing muscle strain in the lumbar region, or a slightly herniated or bulging lumbar disc, causing muscle pain and lumbar soreness. If there is no dysmenorrhea at this time, it will come when it should come in normal times, so there is no clinical comparison. If back pain occurs, strengthen the functional exercise of the lumbar and back muscles, usually avoid sedentary, bending low, chest and abdominal movements, and strengthen the functional exercise of the back muscles such as Xiaoyanfei and flat support. If dysmenorrhea occurs, you must go to the gynecology department to regulate it, to achieve the effect of menstruation relief and pain relief.