There are several possible reasons for the recurrence of sprains in the lumbar region: First, the lumbar muscles are not strong enough, and the exercise of the lumbar muscles is usually neglected, so that the strength of the lumbar muscles and ligaments decreases, and the limit of force that can be withstood gradually decreases, leading to recurring injuries. Second, the injury is not healed and becomes obsolete, resulting in a re-injury once the excessive external force or smaller force acts on the previous injury site. Third, there are more structures in the lumbar region and new injuries can occur, mistaking the location of the previous injury for the previous injury. In addition to muscles and ligaments, the lumbar spine also has fascia, intervertebral joints and lumbosacral joints, and injuries to these locations are called lumbar sprains. The location of the injury should be clarified after each sprain and targeted treatment. Fourth, there may be lumbar disc herniation or lumbar spine structural instability. Some patients with lumbar disc herniation are prone to recurrent episodes with symptoms similar to lumbar sprain, which can easily be misdiagnosed as lumbar sprain.