myofascial pain syndrome

myofascial pain syndrome A condition that is characterized by chronic pain in the muscle tissues and is similar to fibromyalgia. Abbreviated MPS. MPS is sometimes the aftermath of injury. Pain medication, anti-inflammatory medication, and therapies aimed at relaxing the muscle tissues (such as massage, chiropractic, and some forms of acupuncture) have been reported as beneficial. See also fibromyalgia.