The main causes of back pain, calf soreness and ankle pain include chronic strain injury, lumbar disc herniation, lumbar spinal stenosis and lumbar spondylolisthesis. 1. Chronic strain injury: long-term use of the waist, calf force of the people, such as drivers, can be due to chronic strain injury, lumbago, calf soreness and ankle pain and other symptoms. 2. Lumbar disc herniation: Lumbosacral spinal nerves mainly innervate the lower limbs, when the lumbar disc herniation, it can compress the corresponding nerve roots, and symptoms such as lumbago, calf soreness and ankle pain will appear. 3. Lumbar spinal stenosis: Lumbar spinal stenosis can also compress the corresponding nerve roots, causing lumbar pain, accompanied by calf pain and numbness, ankle pain and other symptoms. 4. Lumbar spondylolisthesis: the previous vertebra moves to the front, back or side of the next vertebra, resulting in vertebral slippage. When the lumbar vertebra slips, the same will compress the nerve root, causing lumbar and leg pain. The causes of low back pain, calf soreness and ankle pain are not limited to the above, if the above symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner to consult a doctor to identify the cause of the targeted treatment.