Lying down for a long time and getting up and exercising to recover from back pain may be due to ankylosing spondylitis, lumbar disc herniation, or poor blood circulation. 1. Ankylosing spondylitis: At this time, due to the role of inflammatory factors that cause joint damage, it is easy to lie down for a long time on the back pain, but can be restored after exercise. 2. Lumbar disc herniation: due to lumbar spine overstrain, long-term poor posture may increase the burden on the lumbar spine, accelerating the deformation and degeneration of the lumbar spine, lumbar pain after lying down for a long time will be restored after exercise, or persistent lumbar pain, sciatica, numbness of the lower limbs and other symptoms. 3. Poor blood circulation: the body is in a long-term lying state, poor blood circulation, there will be low back pain, numbness and other symptoms, after the activities of increased blood flow, the symptoms will be relieved. If the symptoms of lumbar pain are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner, to identify the cause and give targeted treatment.