Neck, shoulder, back and leg pain is a common pain for middle-aged and elderly people, and with the beginning of the era of computer life, the incidence of young people has increased sharply, seriously affecting everyone’s work, life and sleep quality. When you go to the doctor, you basically do physical therapy, take painkillers for conservative treatment, and go for surgery in serious cases. The physical therapy as the treatment of neck, shoulder, back and leg pain must be chosen program, hospitals, clinics, and even health care centers have a variety of physical therapy equipment, then choose what kind of physical therapy equipment is the most effective, the safest? The most common physical therapy equipment that people come into contact with is mainly light therapy and electrotherapy. The most common light therapy equipment is infrared, which is inexpensive and easy to operate, and can improve blood circulation, promote the absorption of tissue metabolites, release muscle spasm, and ultimately achieve the effect of pain relief. However, the effect is superficial, effective for joint and muscle injuries and cold, but not effective for deep muscle injuries and pain caused by nerve compression and stimulation. Commonly used electrotherapy for neck, shoulder, lumbar and leg pain are as follows: 1. Low-frequency pulse electrotherapy: promote blood circulation, relieve spasm of diseased muscles and inhibit fibrosis and sclerosis of muscles, strengthen regeneration of nerves and recovery of conduction function. Good effect on muscle tension pain, treatment with a sense of electrical stimulation, causing obvious muscle contraction or throbbing, suitable for better health or the presence of muscle spasm, muscle atrophy and electromyography suggests nerve damage patients, large community clinics have such equipment. 2.Medium-frequency pulse electrotherapy: analgesia, muscle enhancement or relaxation (two-way regulation), promote blood circulation, reduce neuromuscular edema, strengthen nerve regeneration and conduction function recovery, and loosen adhesions. Medium-frequency pulse penetrates deeper than low-frequency pulse, and causes more comfortable and natural muscle contraction than low-frequency pulse. It can be preferred for muscle and joint swelling and deep pain, and is also suitable for patients with fear or poor tolerance of physical therapy. Clinics and physical therapy centers are basically of this kind. 3, computerized medium-frequency electrical therapy (modulated medium-frequency): by low-frequency wave carried on the medium-frequency wave penetrating deep into the human body for treatment, with low-frequency plus medium-frequency two therapeutic effects, the expert pre-prepared massage techniques into the computer program, treatment kneading, kneading, pushing, knocking and other techniques to change, can overcome a long time single mode of treatment of patients generated by “adaptability ” and “tolerance”, greatly improve the treatment effect, and the treatment process is comfortable. But the equipment is expensive and easy to lose, the patient’s heart requirements are higher, more applications in hospitals. 4, high-frequency pulse electrotherapy: short wave, ultra-short wave, microwave, etc., there is a warming effect and ionization effect, applied to soft tissue injury patients. Higher requirements for the operating environment and the patient’s physical condition, requiring a specific operating space and precise treatment parameters, operated by a physician or physical therapist.