Comparative Efficacy of Magnesium Sulfate Iontophoresis and Extracorporeal Shockwave Therapy on Chronic Mechanical Neck Pain

Inclusion Criteria: * medically competent men and women will be included * They had chronic MTrPs in the upper trapezius for more than 6 months * Diagnostic criteria of being a tight band with a palpable nodule and distant pain when subjected to pressure Exclusion Criteria: * subjects with previous neck or shoulder pathology (e.g., fracture, sur¬gery, inflammatory and infectious diseases), * cervical disc pathology, systemic disorder, fibromyalgia, * those who underwent physical therapy for at least the previous 3 months