Myofascial pain syndrome (MPS) is characterized by chronic pain that is caused by multiple trigger points and fascial constrictions.
Pain is localized and often unremitting. There is associated focal point tenderness and pain when a trigger point is touched. In addition to the pain, a patient may experience a hardening and resultant weakening of the muscle as well as a limited range of motion following a few seconds of sustained trigger point pressure.
The pain occurs in distinct, isolated areas of the body and it may cause a variety of localized symptoms. The pain is often described as steady, aching and deep with the intensity ranging from mild discomfort to severe pain. There may be knots under the skin. Often pain does not go away on its own and may need treatment from a physician.