A trigger point is a hyper-irritable spot that is painful. It is called a trigger point because it “triggers” a painful response, but a trigger point is more than a tender nodule. It affects not only the muscle where the trigger point is located, but also causes “referred pain” in tissues supplied by nerves. Trigger points are located in a taut band of muscles fibers. The trigger point is the most tender point in the band. Static compression is used to relieve these points.