Transcutaneous Electrical Nerve Stimulation (TENS) is a non- invasive treatment option for the relief ofc hronic, post-surgical, or post-trauma pain. TENS treatment is safe and effective. Plus with minimal side effects, TENS is a great choice for those looking to reduce their need for, or are unable to take pain medication. TENS Units stimulate sensory nerves to block pain signals and trigger endorphin production. Connected to the skin using 2 or 4 electrode pads, TENS Units transmit at a frequency that is below muscle contraction and are therefore comfortable to use. Session and treatment durations vary, and yours will be determined by your physician.