Fibromyalgia is a rare form of chronic pain, stiffness, and tenderness in muscles, joints, and tendons. Unlike many other similar muscle and joint pain disorders (rheumatic disorders), fibromyalgia pain occurs without swelling. Fibromyalgia is characterized by the presence of at least 11 of 18 of sensitive areas, called tender points, and overall body pain without swelling. Touching these tender points may trigger severe discomfort and muscle spasm.

The cause of fibromyalgia is not clearly known yet, but many different factors, such as stress or inadequate sleep, may trigger or worsen the symptoms.

There is no specific treatment for fibromyalgia, but a number of cures such as gentle stretching and low-impact exercise, stress reduction, and medications can relief its symptoms.