The electrotherapy apparatus is divided into many kinds, common electrostatic therapy apparatus, direct current therapy apparatus, pulsed electric therapy apparatus, electric ion introduction therapy apparatus and so on, very many kinds, but the efficacy is roughly divided into the following categories: 1, analgesic effect, electrotherapy has the effect of unblocking the meridians, improve the pain threshold, can also relieve muscle spasm, reduce the symptoms of nerve irritation, so as to relieve the degree of pain. 2, anti-inflammatory effect, including acute septic inflammation, chronic non-infectious inflammation and chronic tissue infection, 3, promote the role of sleep. It can promote the rapid absorption and dissipation of inflammation. 3, promote the role of sleep, electrotherapy can regulate nerve function, thus improving sleep quality. 4, increase the excitability of soft tissues, for muscle atrophy and nerve paralysis have a certain therapeutic effect. 5, can loosen adhesions, with the role of softening the scar. 6, increase the excitability of soft tissues, for muscle atrophy and nerve paralysis have a certain therapeutic effect. 6.Anti-allergic, can stimulate the local, reduce the local allergic reaction.