Myofascial pain syndrome (MPS), also known as chronic myofascial pain (CMP), is a syndrome characterized
by chronic pain caused by multiple trigger points and fascial constrictions. Among the symptoms are
referred pain, limited range of motion, and sleep disturbance.
Myofascial pain can occur in distinct, isolated areas of the body, and because any muscle or fascia
may be affected, this may cause a variety of localized symptoms. More generally speaking, the muscular
pain is steady, aching, and deep. Depending on the case and location the intensity can range from mild
discomfort to excruciating and "lightning-like". Knots may be visible or felt beneath the skin. The
pain does not resolve on its own, even after typical first-aid self-care such as ice, heat, and rest.
The precise causes of MPS are not fully documented or understood. Some systemic diseases, such as
connective tissue disease, can cause MPS. Poor posture and emotional disturbance might also instigate
or contribute to MPS.