Sickness and pain in the back during menstruation may be caused by physiological reasons, lumbar spine disease and other reasons. 1. Physiological reasons: pregnancy due to hormonal changes in the body, can make the intervertebral joints, ligament laxity, at the same time increase the uterus so that the center of gravity of the body shifted forward, lumbar vertebrae protruded forward so that the back extensor muscles are in a state of sustained tension, there will be a lot of symptoms of lumbar and back pain, need to be gradually recovered after giving birth, can be relieved through appropriate rest, avoid standing for a long time, appropriate calcium and appropriate massage and other symptoms. 2. Lumbar spine diseases: such as lumbar intervertebral disc herniation, after pregnancy due to the lumbar spine weight-bearing increase, may varying degrees of aggravation of the pain, in the postpartum period will also appear in the lumbar pain, combined with the history of disease, clinical manifestations and magnetic resonance imaging examination can be a clear diagnosis. For those with severe pain, surgical treatment is required if necessary. During the menstruation period, pay attention to rest more, at the same time, should relax, avoid tension, anxiety, any discomfort should be timely to the hospital, the doctor to clarify the diagnosis, and cooperate with the doctor to deal with the symptoms.