Low back pain, buttock pain and leg pain may be caused by overwork, but also lumbar disc herniation, lumbar spinal stenosis, as well as lumbar spine tuberculosis and other diseases. 1. Excessive exertion: if a short period of time to carry out heavy physical labor will lead to the body muscle lactic acid accumulation, thus appearing lumbar pain buttock pain and leg sore performance. This is a normal physiological phenomenon, and the symptoms will usually improve after rest. 2. Lumbar disc herniation: Lumbar disc herniation may be caused by disc degeneration, lumbar spine injury, heredity and other reasons. Patients will have lumbar pain, radiating pain or weakness in lower limbs, so patients will have lumbar pain and buttock pain and leg pain. 3. Lumbar spinal stenosis: lumbar spinal stenosis is considered to be caused by congenital vertebral canal underdevelopment, osteophytes, herniated intervertebral disc and other factors. Patients will have low back pain, sciatica, intermittent claudication and other symptoms, thus patients will show back pain buttock pain and leg pain. 4. Other: patients with back pain and leg pain are also considered to be lumbar spine tuberculosis, lumbar spine tumor and other diseases. Back pain, buttock pain and leg pain, after resting the symptoms did not improve, you need to consult a doctor in time to check the cause of the disease, under the guidance of the doctor, choose targeted treatment measures.