Trigger Point Therapy, also known as trigger points, are described as hyperirritable spots in the fascia surrounding skeletal muscle. They are associated with palpable in taut band of muscle fibers. They are a topic of ongoing controversy, as there is limited data to inform a scientific understanding of the phenomenon. Accordingly, a formal acceptance of myofascial ‘knots’ as an identifiable source of pain is more common among chiropractors, physical therapists, osteopathic practitioners and bodyworkers.

The trigger point model states that unexplained pain frequently radiates from these points of local tenderness to broader areas, sometimes distant from the point itself. Practitioners claim to have identified reliable referred paint patterns which associate paint in one location with trigger points elsewhere. There is variation in the methodology for diagnosis of trigger points and a dearth of theory to explain how they arise and why they produce specific patterns of referred pain.