In
TENS Unit therapy,
electrodes are placed on the skin, either directly over the painful area or more commonly, at key points along the nerve pathway. One of the most compelling reasons for prescribing
TENS Units for pain relief is that this therapy has few side effects.
TENS is non-addictive, causes no drowsiness, and can be used indefinitely without the problems associated with prolonged drug use. The most common reason for prescribing
TENS is for chronic low-back pain.