The video illustrates using "dry needling" to treat myofascial pain syndrome, which is explained in the article "Myofascial Pain: The Hidden Health Problem," which appears in the January 2014 issue of Clean Run. The article is written by Michael C. Petty, DVM, CVPP, CMAV, CCRT, Dipl. AAPM. Myofascial pain syndrome is a common but rarely diagnosed pain issue in performance dogs. It is caused by extended contraction of a few muscle fibers that results in painful contracted knots of muscle called "trigger points."