Physical factor therapy is often referred to as physical therapy, refers to the use of sound, light, electricity, magnetism, cold, heat, force and other physical factors and natural factors, such as sunlight, air, hot springs and other natural factors or mechanical stimulation, such as acupuncture, massage, traction and other methods of treatment of disease, belongs to the category of rehabilitation medicine. Among them, sound is ultrasonic therapy, light includes infrared, ultraviolet, incandescent light, laser therapy, electricity includes low-frequency ion introduction therapy, medium-frequency electric therapy and microwave high-frequency electric therapy, cold includes cold compresses, ice packs, etc., heat includes hot compresses, radiation heat and electromagnetic shock heat, etc., and force refers to exercise and exercise therapy. Physiotherapy is widely used in clinical applications, a wide range of adaptations, the prevention, diagnosis and treatment of diseases are meaningful, many hospitals have a special physiotherapy department.