to investigate the effects of Magnesium Sulphate Iontophoresis versus High Power Pain Threshold Ultrasound on pain, function and range of motion on active MTrPs found in the upper trapezius.

Myofascial pain syndrome (MPS) is a musculoskeletal chronic pain disorder that affects the majority of pain population and characterized by the presence of trigger points. MPS is usually associated with tenderness, spasm, movement limitation and referred pain .

Myofascial trigger points (MTrPs) are hyperirritable taut fibers of skeletal muscle. The taut fibers within the muscle create palpable nodules that may cause local pain, and refer pain elsewhere with soft tissue examination .

Inclusion Criteria:

• Subjects, with age ranged from 19-23 years (Forman et al, 2014) from both genders. The subjects had active MTrPs in the upper fibers of trapezius muscle.

Exclusion Criteria:

• • History of whiplash injury.

  • History of cervical spine surgery.
  • Cervical radiculopathy or myelopathy.
  • Having undergone physical therapy within the past three months before the study.
  • Non- rheumatologic diseases as multiple sclerosis, thyroid dysfunction and chronic infection.
  • Rheumatologic condition as poly-articular osteoarthritis, rheumatoid arthritis and advanced cervical spine degenerative diseases.