Mild back pain with menstruation is normal because during menstruation, due to the increased secretion of prostaglandins in the body, it tends to cause uterine spasms. It can also cause muscle spasms in the lower back and back pain. The hormones in the body will change after menstruation and the muscle tissue will not adapt to the hormonal changes in the body easily leading to this phenomenon. Back pain can also be caused by excessive physical exertion during menstruation, as well as poor sleep quality and abnormal neurotransmitters. However, if the back pain cannot be relieved after serious rest, it may be caused by gynecological inflammation, such as endometritis, pelvic inflammatory disease, cervicitis, vaginitis and so on. It is best to have a routine white belt examination, ultrasound examination, and if there is a lumbar strain that can also cause this phenomenon, it is best to treat the symptoms. If you have a gynecological inflammation, you need to take gynecological Qianjin tablets, anti uterine inflammation tablets, and if you have a lumbar muscle strain, you need acupuncture and massage.