Transcutaneous electrical nerve stimulation is mainly used to treat pain from various causes and can also be applied to promote healing of wounds after surgery. Its frequency is generally between 2-160 Hz belonging to the low frequency range, the pulses should be short or shorter and the width is generally between 9-350 μm. If the pulse is too wide, the fibers that transmit pain are activated and the ions under the motor are activated, a condition that may cause an increase in pain. The intensity is generally chosen to be comfortable and can be chosen to stimulate the afferent nerve response of proprioception without touching the efferent nerve response of movement predominantly. The intensity of the current varies in form; currently there are dual or single streams, as well as bidirectional pulses, and single wave directions. There is also an asymmetric bidirectional pulse, and all of these methods can be used.