An interferential machine is a type of electrical stimulation device used in physical therapy and rehabilitation. It uses a technique called interferential current therapy (ICT) to send low-frequency electrical pulses through the skin and into the muscles and tissues. The electrical pulses are generated by two separate waveforms that “interfere” with each other, creating a third waveform that has a higher frequency. This higher frequency waveform is thought to stimulate the body’s own healing mechanisms to reduce pain and improve muscle function. Interferential machines are typically used for conditions such as chronic pain, muscle and joint injuries, and nerve damage.