Electromagnetic therapy is using low frequency electromagnetic pulses to medically treat diseases. The body itself uses magnetic energy and electric currents that control everything from muscle movement to brain activity. Electromagnetic therapy is based on the belief that the cause of pain and disease are imbalances in the electromagnetic fields within the body. Low voltage electricity, magnetic fields, and low frequency radio waves can correct these imbalances and help the body to heal itself. It plays roles in activating blood and lymph circulation, relieving pain and swelling, etc. It is applicable to chronic kidney failure, hypertension, high blood lipid and lumbago, etc.