Efficacy of Extracorporeal Shockwave Therapy on Ultrasonography Changes of Upper Trapezius Myofascial Trigger Points in Patients With Non Specific Neck Pain

Inclusion Criteria: * Sixty patients receiving a diagnosis of non-specific neck pain with upper trapezius myofascial trigger points by an orthopaedist physician. * Body mass index of participants was normal less than (30 kg/m2)(Al-asadi, 2018). * Age over 18 years. * Presence of taught band. * Presence of hyper irritable spot in a taught band, and reproduction of the typical referred pain pattern of the myofascial trigger point in response to compression Exclusion Criteria: * Having signs and symptoms of neurological disorders that cause nerve root compression. * Headache as a consequence of specific headache diagnosis. * Having a history of specific signs of malignancy, or infection. * Having a history of trauma with or without proven structural disorders in the region of the neck, shoulder, and head (e.g. whiplash). * Having signs and symptoms of cerebrovascular insufficiency. * Having a severe chronic disease of the locomotor system (e.g. polyarthritis, muscular disease * Any participant with contraindications to shock wave therapy