Tenderness on compression in 11 out of 18 specific sites called “Pressure Points" is the hallmark of Fibromyalgia.

People suffering with fibromyalgia may also experience tingling or numbness in the extremities, or tension headaches.

They may have no underlying disorders, or may have such conditions as rheumatoid arthritis, Lyme disease, spinal arthritis, or irritable bowel syndrome.