TENS treatment consisted of two 15 minute sessions with a 2 minute break in between. During each 15 minute session, the unit was kept at a frequency of 120 Hz and a short pulse duration of 120 µs.

Find out if TENS, a type of nerve stimulation, can help with your chronic pain. WebMD explains how TENS works and which types of pain it’s best for.

TENS units —transcutaneous electrical nerve stimulation — are devices placed on the skin that send stimulating electrical signals to the nerves.