Tender/trigger points

From Wikipedia:

Fibromyalgia (FM or FMS) is a chronic syndrome (constellation of signs and symptoms) characterized by diffuse or specific muscle, joint, or bone pain, fatigue, and a wide range of other symptoms. It is not contagious, and recent studies suggest that people with fibromyalgia may be genetically predisposed.^[1] It affects more females than males, with a ratio of 9:1 by ACR (American College of Rheumatology) criteria.^[2] Fibromyalgia is seen in 3% to 6% of the general population, and is most commonly diagnosed in individuals between the ages of 20 and 50, though onset can occur in childhood. The disease is not life-threatening, though the degree of symptoms may vary greatly from day to day with periods of flares (severe worsening of symptoms) or remission. The syndrome is generally perceived as non-progressive, yet that issue is still debated.^[3] Fibromyalgia may actually be composed of several clinical entities, ranging from a mild, idiopathic inflammatory process in some individuals to a somatoform disorder resulting from clinical depression in others, with probable overlaps in between.^[4] Current diagnostic criteria are insufficient to differentiate these entities. Indeed, there is considerable controversy among physicians over the issue of whether the etiology of fibromyalgia syndrome is primarily physical or psychological. While patients diagnosed with fibromyalgia syndrome may harbor strong beliefs about the cause of their symptoms and may even attribute them to a particular traumatic event or acute illness, the medical evidence for this is scant. Furthermore, disability claims associated with fibromyalgia syndrome have increased dramatically over the past several years. This is also a source of considerable controversy, with some physicians endorsing the concept of disability and others opposing it. Indeed, one highly respected rheumatologist, Frederick Wolfe, M.D., has published articles critical of the notion that fibromyalgia syndrome is disabling and has recommended that physicians encourage their patients to remain active. This has not prevented certain doctors and attorneys from continuing to promote the disability concept.

(I boldeded.]