After a lumbar sprain, using a lumbar belt can be very helpful. Because the pain can stimulate the muscle tension around the lumbar spine, resulting in an imbalance of strength on both sides around the lumbar spine, the protection for the lumbar spine is weakened. When wearing a lumbar belt can well protect the lumbar spine, reduce the protection of muscle strength around the lumbar spine, good pain relief. But after the lumbar pain is gradually reduced, the lumbar belt can no longer be worn, because the prolonged use will lead to the weakening of muscle strength around the lumbar spine, muscle atrophy, the protection of the lumbar spine is further weakened, more likely to appear lumbar muscle sprain. The lumbar belt should be used to treat lumbar sprains at a good time, and after the belt is removed, functional rehabilitation exercises for the lumbar back muscles should be actively carried out to strengthen the strength of the lumbar back muscles.