Back pain in the morning is considered to be related to physiological factors, but may also be related to pathological factors, such as lumbar dorsal myofasciitis, ankylosing spondylitis, osteoporosis and so on. 1. Physiological factors: Catching a cold in the lower back at night or prolonged posture may cause muscle spasm, leading to back pain in the morning. 2. Low back myofasciitis: due to aseptic inflammation of the myofascia, back pain in the morning can also occur, and the symptoms can be alleviated by appropriate lumbar activities. 3. Ankylosing spondylitis: Mostly back pain in the morning, which can be alleviated by appropriate activities, accompanied by morning stiffness and fatigue. If the back pain persists in the morning, you need to go to the hospital for further examination and treatment after a clear diagnosis.