75% of pain is caused by trigger points (areas of contracted cells in muscle tissue), but they are drastically under-diagnosed as the source of pain. Trigger points may refer pain and other symptoms both in the local area and/or to other areas of the body, but since over 74% of trigger points are not located in the area where you feel pain, treating the local area does not resolve the problem most of the time. The most common "referral patterns" have been well documented and diagrammed over decades of research.

The introductory chapter of this book includes general...