My logo graphic shows a universal STOP symbol superimposed onto a MYOFASCIAL TRIGGER POINT MAP, which is one of several therapeutic massage approaches that I use to relieve pain. Myofascial trigger points, also known as trigger points (TrPs; not to be confused with he "tender points", used for fibromyalgia diagnosis), are described as hyperirritable spots in skeletal muscle. See, e.g., Travell, Janet; Simons David; Simons Lois (1999). Myofascial Pain and Dysfunction: The Trigger Point Manual (2 vol. set, 2nd Ed.). USA: Lippincott Williams & Williams. ISBN 9780683083637.
Trigger points are associated with palpable nodules in taut bands of muscle fibers, and 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 bodyworkers, physical therapists, chiropractors, and osteopathic practitioners. Nonetheless, the concept of trigger points provides one useful framework which may be used to help address certain musculoskeletal pain.
The trigger point model states that unexplained pain frequently radiates from these points of local tenderness to broader areas, sometimes distant from the trigger point itself. Practitioners claim to have identified reliable referred pain patterns or “Maps” which associate pain in one location with trigger points elsewhere. Compression of a trigger point may elicit local tenderness, referred pain, or local twitch response. The local twitch response is not the same as a muscle spasm. This is because a muscle spasm refers to the entire muscle contracting whereas the local twitch response also refers to the entire muscle but only involves a small twitch, no contraction.
Among physicians, various specialists might use trigger point therapy. These include physiatrists (physicians specializing in physical medicine and rehabilitation), family medicine, and orthopedics. Osteopathic as well as chiropractic schools also include trigger points in their training. Other health professionals, such as athletic trainers, occupational therapists, physiotherapists, acupuncturists, massage therapists and structural integrators are also aware of these ideas and many of them make use of trigger points in their clinical work as well.