Several did show some positive short term effects, but it’s no surprise that several don’t. Dry needling isn’t going to cure pain on its own or work for everyone, much like other forms of bodywork. Individual results vary and it needs to be done over a long period of time alongside other work to restore stability and mobility. A supplementary treatment just needs to be low-risk, accessible, and possibly beneficial enough to try. The risks associated with dry needling are less severe than those of several common PT interventions such as corticosteroid injections. To say nothing of the risks associated with chiropractic.

The lack of a standardized placebo is a problem, yes. This study had pretty good results from using a blunted needle glued in an introducer. The patient feels the sensation of the introducer being pressed against skin and “pistoned” in, but the needle doesn’t actually make contact. In the group of people who had not received dry needling before, only one correctly identified that they had received the placebo.