What is a Trigger Point (TrP)?
A trigger point, or myofascial trigger point, is simply a knot in a muscle or myofascial unit. Trigger points are quite common and are hyper-irritable spots within and between tight muscle(s) and supporting fascia. When pressed – or sometimes when at rest – trigger points can produce a local or referred pain (pain felt in another area of the body), tenderness, and restricted movement. There are two types of trigger points – latent, and active trigger points.