Fibromyalgia is a fairly common long-term (chronic) condition that causes widespread muscular pain. It’s thought that as many as 1 person in every 25 may suffer from it. More women than men are affected and the condition varies a great deal from one person to another and from day to day. Fibromyalgia isn't inflammatory or degenerative so it won’t cause permanent damage to your muscles, bones or joints. It can have a major impact on your quality of life, but it’s not life threatening or progressive.