Interferential current therapy is an electrical therapy that interferes with the transmission of pain messages throughout the body and reduces pain; it increases blood flow to the damaged tissue. It is NOT a TENS unit. Interferential is particularly useful in treating conditions involving injuries to musculoskeletal system and we use it at Hall Chiropractic with great results.
The current produces an effect that can stimulate the secretion of endorphins, a natural pain reliever. This will help relax strained muscles and help promote healing.
Interferential can increase localized blood flow, stimulate local nerve cells and stimulate muscles. This can cause a more rapid recovery in damaged soft tissues.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1478878/