Patients with low back pain a few days after delivery may be caused by prolonged braking. Patients may be overly tired or have very severe pain after delivery, and then need to stay in a certain position and braking. During this process, the muscles of the lumbar region may become spastic or the soft tissues of the lumbar region may become overly compressed, both of which can cause significant lumbar pain. This may be caused by a sterile inflammation of the lumbar region, where the patient’s resistance is very poor, and if the lumbar region is cold, a sterile inflammation of the soft tissues can easily cause pain.