Lower back pain can be caused by the following reasons: first, strain of the lumbar muscles, when one side of the lumbar muscles have chronic strain can have a side of the lower back pain, especially when bending back pain is very obvious, this time to early physical examination and examination, to exclude other diseases to diagnose. Second, tendonitis, when the lumbar muscles have chronic tendonitis, there can also be pain at the stop of one side of the waist and pain in the lower back, then early physical examination to diagnose, early physiotherapy and oral medication. Thirdly, when there is a tumor in the lower back muscle, there can also be pain in the lower back, often swelling and pain, then early physical examination is needed to diagnose and treat the tumor by touching the lump.