I cannot say enough positive things about dry needling performed by physical therapists.  I have seen profound and dramatic improvements if not complete and total elimination of pain caused by myofascial trigger points within muscle tissue, usually requiring only one and sometimes two (rarely more) treatment sessions.  The relief is almost always long-term if not permanent if the patient is also taught how to prevent trigger points from forming again and performs the things they learn during their treatment sessions.  Once trigger points are eliminated, this facilitates the restoration of normalized blood flow, balanced pH, muscle function, performance of not only activities of daily living but more rigorous and demanding activities, not to mention pain relief!  No one knows the musculoskeletal system better than physical therapists.  As a physician who works in a pain clinic (and is also an acupuncturist) during a journal club meeting I attended some years ago stated, "Dry needling is trigger point therapy done right and there is nobody more well qualified the do it than physical therapists."