The stiffness of the back muscles is mainly due to the following reasons: 1. prolonged head bowing, ambulatory work and prolonged immobility in one posture in daily life can lead to strain on the back muscles, resulting in muscle inflammation and local stiffness. 2. it may be due to repeated strain on the muscle fibers and local fibrous tissue hyperplasia, resulting in local stiffness. 3. 3. The stiffness may be due to cervical spondylosis or local tumor disease or septic infection, resulting in muscle stiffness. If a patient has stiff back muscles, it is best to consult a doctor in time to identify the cause and then give targeted treatment.