Fibromyalgia pain is widespread pain in the muscles and soft tissues above and below the waist and on both sides of the body. People with fibromyalgia feel pain, tenderness, or both even when there is not injury or inflammation.

Fibromyalgia can cause long-lasting (chronic) pain. It has no cure. No one knows for sure what causes fibromyalgia. But experts have some ideas such as: Nerve cells may be too sensitive, chemicals in the brain (neurotransmitters) may be out of balance, the deep phase of sleep may be disrupted and affect the amount of hormones that your body releases.