The Effectiveness of Dry Needling Treatment in Patients With Shoulder Myofascial Pain Syndrome

Myofascial pain can be diagnosed by the presence of one or more myofascial trigger points (MTrPs), defined as hyperirritable spots in taut bands of skeletal muscle fibers palpable by hand. The treatment of myofascial pain primarily relies on the inactivation of MTrPs, often through manual pressure techniques or dry needling. In manual pressure techniques, the physiotherapist applies increasing pressure directly to the MTrP. In dry needling, acupuncture-like filiform needles are applied to the same point. There are two types of dry needling: superficial dry needling, which penetrates only the skin and superficial muscle, and deep dry needling, which involves inserting a needle directly into the MTrP. The sole or adjunct effectiveness of dry needling treatment targeting the trapezius and infraspinatus muscles has been investigated, particularly in patients with shoulder myofascial pain syn