Interferential current therapy is an effective therapy to relieve pain and accelerate the self-healing process, getting your body back to a healthy, pain free state. The high frequency signals of an IFC penetrate through the skin into deeper lying muscle tissues.

Interferential current therapy (IFC) is based on summation of 2 alternating current signals of slightly different frequency. The resultant current consists of a cyclical modulation of amplitude, based on the difference in frequency between the 2 signals. When the signals are in phase, they summate to an amplitude sufficient to stimulate, but no stimulation occurs when they are out of phase. The beat frequency of IFC is equal to the difference in the frequencies of the 2 signals.

For example, if circuit A carries a current with the frequency of 4000Hz and Circuit B carry a current with a frequency of 3980 Hz, then the low frequency produced will be 20 Hz and this frequency is very useful in pain modulation. A new low-frequency current known as the beat  frequency  is equal to the difference in frequencies between the two medium frequency currents produced in the tissues at the point where the two currents cross.