Low back pain consider lumbar muscle strain, osteoporosis, lumbar dorsal fasciitis, lumbar intervertebral disc herniation, lumbar spinal stenosis, ankylosing spondylitis. 1. Lumbar muscle strain: For example, white-collar workers who often work at desk or people who often do physical work are prone to lumbar back pain, which is aggravated by fatigue or catching a cold, and the symptoms can be alleviated after resting. 2. Osteoporosis: mostly occurring in the elderly, early symptoms will appear back pain and leg cramps, in serious cases will cause hunchback, through bone densitometry can be a clear diagnosis, the application of calcium tablets and anti-osteoporosis drugs can reduce the symptoms. 3. Lumbar dorsal myofasciitis: it can cause lumbar back pain on both sides of the lumbar vertebrae, which is light during the day and heavy at night. 4. Lumbar intervertebral disc herniation: it can cause back pain and leg pain and numbness. 5. Lumbar spinal stenosis: compression of the nerves can appear back pain, leg pain, walking limp. 6. Ankylosing spondylitis: low back pain, lumbar stiffness, limited activities. So the back pain is generally for the above reasons, if the symptoms are more serious, it is recommended that the hospital to check.