The role of low-frequency therapeutic instrument is mainly through electromagnetic waves, so that the human organ appears to heat, through this way can improve human immunity, regulate the endocrine as well as the nervous system, can dredge the meridians, through the thermal effect can make microcirculation is improved accordingly. Often used in the treatment of hypertension, neurasthenia, chronic gastroenteritis, frozen shoulder, cervical spondylosis, as well as a variety of rheumatoid arthritis, rheumatoid arthritis, can be treated and relieved. In the clinic, the application of low-frequency therapeutic instrument is mainly the use of its thermal effect, so in the application process should pay attention to the rhythm, do not apply for a long time, so as not to cause damage to blood vessels.