Multifunctional Tens Massager with 12 Preprogrammed Massage Modes for Pain and Muscle Relief. TENS physiotherapy massager helps relieve pain associated with sore and aching muscles in the shoulder, waist, back, neck, upper extremities (arm), and lower extremities(leg) due to strain from exercise or normal household work activities. An electric massager is also intended to be used to stimulate healthy muscles in order to improve and facilitate muscle performance. Non-Invasive, Non-Drug Choice for Relieving Pain. Great Device You Can Use at Home for Pain Management. If you have chronic or acute pain, just try this TENS massager for relief. It is with human body simulation technology, and microcomputer intelligent control technology, that simulates a variety of massage methods. Help for treating back pain, arthritic or inflamed discs/ joints