The symptoms of back pain and calf pain may be caused by the following reasons: i. It may be caused by overexertion. For example, patients who do not exercise regularly and do related physical activities may cause a large amount of lactic acid deposition in the lower back and calves, which in turn leads to soreness and pain here. Second, it may be caused by bad posture. For example, if the patient has continuous bending or heel pads for a short period of time, it may cause muscle spasms in the lower back and calves, resulting in soreness here. In addition, if the patient has a bad sitting posture or a bad lying posture, it may also cause this condition. Third, it may be caused by cold here. For example, if the patient jumps into a cold swimming pool in summer or swims for a long time, it may also cause cold, resulting in muscle spasm and pain. Fourth, it may be caused by the lesion of peripheral nerves. For example, the onset of lumbar disc herniation produces soreness and pain due to nerve root stimulation. Patients with such symptoms are advised to rest flat on a hard bed for a period of time, and can do physical therapy such as acupuncture and tui na, etc. If they cannot be relieved, they need to go to an orthopedic clinic.