After bending over, the left lower back can’t get up, the common causes are acute lumbar sprain, small joint disorder, and lumbar disc herniation, etc., need to be treated for the cause of the disease, and the treatment method has bed rest, hot compresses, manipulation of reset and medication. 1. Acute lumbar sprain: left lumbar sprain caused by excessive bending leads to muscle injury of lumbar vertebrae, should be bed rest, lumbar both sides of the pillow braking, can reduce pain. 72 hours later can be hot compresses to promote blood circulation. 2. Small joint disorder: because of the lumbar spine joint synovial membrane suddenly embedded or small joint dislocation caused by the need for manipulation of reset treatment, if the pain is severe, according to the doctor’s instructions, temporary oral non-steroidal anti-inflammatory drugs, such as ibuprofen. 3. Lumbar intervertebral disc herniation: Bending over will cause the intervertebral disc to irritate the nerves and aggravate the symptoms, and the lumbar muscles should be relaxed by resting in bed. After bending the left lower back can not get up there may be other reasons, such as lumbar spondylolisthesis, etc., if the rest does not get better or aggravated should be promptly to the regular hospital, the doctor according to the symptoms, signs and auxiliary examination to determine the specific cause of the disease, according to the cause of the disease to give the correct treatment.