The pain in the back after waking up may be caused by the following reasons: First, because the patient chooses a soft bed, after sleeping in a soft bed, the protruding part of the body bone sinks and pulls the muscles of the back, resulting in excessive stress on the muscles of the back causing pain. Second, due to the stimulation of wind and cold during night sleep, incorrect posture during night sleep, local muscles are overly compressed, and over time, strain occurs, inducing pain in the back. Third, due to excessive daytime strain or heavy backpack during the day, resulting in fatigue of the muscles of the back, poor quality of sleep at night, the muscles of the back are not relaxed, which can cause significant back pain after waking up.