There are two main clinical causes of low back pain after waking up. First, lumbago caused by cold when sleeping without a good quilt. Because the cold can lead to the waist capillary constriction caused by the waist blood supply decline, the waist muscle relative ischemia, lack of oxygen will appear waist pain, soreness is exactly the characteristics of muscle pain, so not covered with a good quilt caused by the cold is the primary cause of morning waking up waist pain. Commonly also contains blowing air conditioners as well as blowing fans and other reasons, also can lead to back pain. Secondly, ankylosing spondylitis may cause patients to wake up with back pain in the morning, mostly seen in young and strong patients.