The intermediate frequency therapeutic instrument is actually like a massage technician who goes to the Chinese medicine physiotherapy hall. Its therapeutic principle is to simulate acupuncture and moxibustion in traditional Chinese medicine. The pulse current controlled by CPU in the therapeutic instrument can dredge blood vessels and nerves for acupoints and achieve the effect of smooth communication. This is consistent with the principle of acupuncture in traditional Chinese medicine. The difference is that one uses silver needles to dredge blood vessels and nerves, and the other uses pulse currents with different frequencies. The current amplitude and frequency of intermediate frequency therapeutic instrument change with the amplitude and frequency of low frequency current. Therefore, the current of intermediate frequency therapeutic instrument has the characteristics and therapeutic effect of low frequency current and intermediate frequency current respectively.

The principle of intermediate frequency therapeutic instrument, in a certain frequency range, the impedance of human tissue is inversely proportional to the frequency, and the effect of low frequency current on human tissue will be worse, while high frequency current will make human tissue unbearable, so the intermediate frequency current itself has therapeutic effect on human body, and then it can not only feel comfortable, but also treat corresponding diseases through acupoint impact.