Fibromyalgia is a very common condition that affects millions of American adults—mostly women (although it can affect men and children). It is often mistaken for an arthritic condition because it affects the joints, but it is not technically a form of arthritis, because it doesn’t cause joint damage; it simply impairs the joint’s ability to function. Fibromyalgia can cause widespread pain, tenderness, stiffness, numbness and tingling in the limbs, headaches, trouble sleeping, and sensitivity to changes in temperature, bright lights, and noises. It also is associated with irritable bowel syndrome, restless leg syndrome, and cognitive impairment. The cause of fibromyalgia remains unknown. However, many cases begin shortly after a physically or emotionally traumatic event. Although some cases begin suddenly, without warning. Many people with fibromyalgia are misdiagnosed because pain and fatigue are associated with so many other conditions. Fibromyalgia is chronic, but it will not get worse over time. In addition to medication, some at-home treatments may be helpful, including getting plenty of rest, staying active, reducing workload or changing to a less stressful or demanding job, and eating a nutritious, well-balanced diet. Physical therapy also can be beneficial in teaching people with fibromyalgia how to manage and relieve pain, stiffness, and fatigue.