Compressing this hyperirritable focus is locally painful and may give rise to characteristic referred pain, tenderness, and autonomic phenomenon. The area of pain referral, which is surprisingly consistent, is termed the 'zone of reference'. Myofascial pain is thought to result from an acute muscle strain or overload that occurs at the time of impact. One hypothesis is that a small area of neuromuscular irritiablity develops and becomes self-sustaining. A tender pont may then develop in a band of contracted muscle.
Patients recognize certain factors as aggravators of myofascial pain.
Aggravating factors are usually related to activities or postures that cause contraction of involved muscles. Sequence of Symptoms Injury occurs. No significant symptoms at the scene. Later that evening, they are aware of some stiffness. Seek medical examination.