Electrical stimulation therapy is used to relieve headaches, shoulder pain, neck pain, back pain as well as pain in the extremities. Electric stimulation therapy is a therapeutic treatment that applies electrical stimulation in treating muscle spasms and pain. It can help prevent atrophy and build strength in patients with injuries. It is also helpful in keeping muscles active especially after any type spinal cord injury or strokes. Trans cutaneous electrical nerve stimulation (TENS) is a therapy that uses low-voltage electrical current for pain relief which are predominately used for nerve related pain conditions (acute and chronic conditions). TENS machines works by sending stimulating pulses across the surface of the skin and along the nerve strands.