Electric stimulation therapy utilizes low voltage electric currents to provide pain relief. It is thought that electrical stimulation therapy directly blocks transmission of pain signals along nerves, and promotes endorphin release. There are multiple kinds of electric stimulation therapy such as: transcutaneous electrical nerve stimulation (TENS), electrical muscle stimulation (EMS), interferential current, and Russian stimulation. Electric stimulation therapy is a great choice for treatment/rehabilitation of conditions such as: rotator cuff injuries, low back pain, neck pain, sciatica, arthritic conditions, extremity pain, and headaches/migraines.