Electric stimulation therapy is a therapeutic treatment that applies electrical stimulation in treating muscle spasms and pain by placing the electrode pads on the skin. The electrical pulses generated by the machine run faster than your pain sensors that communicate to your brain when you are in pain. Thus, the stim machine can interrupt your pain sensors and can help block you from feeling the pain temporarily. Another concept is that these pulses allow your body to release endorphins which also help to alleviate pain. With e-stim, you will feel a tingly, ant-like sensation. There should be no discomfort or pain!