fibromyalgia

Fibromyalgia syndrome (FS) is a non-articular rheumatic disease characterized clinically by multiple sites of pain and stiffness in the muscular and skeletal systems, with tender points at specific locations. Fibromyalgia syndrome can be secondary to trauma and various rheumatic diseases, such as osteoarthritis, rheumatoid arthritis, and various non-rheumatic conditions (e.g., hypothyroidism, malignant tumors). This type of fibromyalgia syndrome is referred to as secondary fibromyalgia syndrome. When not accompanied by other disorders, it is termed primary fibromyalgia syndrome.