Sleeping 5 hours on the beginning of back pain may be sleeping posture poor physiological causes, may also be lumbar muscle strain, lumbar degenerative diseases and other diseases caused by. 1. Poor sleeping posture: common in sleeping posture is not correct or bed board is too hard, too soft may lead to lumbar muscle continuous tension spasm, the patient can sleep for 5 hours on the beginning of back pain. 2. lumbar muscle strain: generally have a history of long-term exertion, caused by chronic cumulative injury to both sides of the lumbar muscles, resulting in sleeping because of lumbar relaxation, localized inflammatory edema, oozing, the patient may appear to have slept 5 hours on the beginning of the lumbar acid every day. 3. Lumbar degenerative diseases: common in the lumbar disc herniation, lumbar spinal stenosis and other diseases, in the sleep due to poor posture or soft bed caused by changes in the physiological curvature leading to increased local compression, the patient may appear to have slept for five hours on the lumbar acid every day. Sleeping for five hours on the back of the day may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.