Walking for a long time back pain may be lumbar muscle strain, lumbar disc herniation, lumbar spinal stenosis and other factors. 1. Lumbar muscle strain: the human body needs the assistance of the lumbar muscles in the process of walking steps, the patient in the process of walking for a long time will cause lumbar muscle fatigue, there may be symptoms such as fasciitis, which in turn leads to pain. 2. Lumbar disc herniation: If the patient suffers from lumbar disc herniation, the pressure on the intervertebral discs will increase during long-term walking, which may compress the nerve roots and lead to lumbar pain. 3. Lumbar spinal stenosis: patients suffering from lumbar spinal stenosis will be aggravated by walking for a long time, and symptoms such as compression of nerves by the vertebrae will occur, thus resulting in lumbar pain. There are many other causes of prolonged walking back pain, patients should pay attention to rest, if the symptoms are serious should go to the hospital in time.