Fibromyalgia
Fibromyalgia is a disorder that causes muscle pain and fatigue. People with fibromyalgia have chronic widespread pain, as well as 'tender points' on the neck, shoulders, back, hips, arms, and legs, which hurt when slight pressure (about 9 pounds) is applied.
People with fibromyalgia may also have other symptoms, such as; trouble sleeping, morning stiffness, headaches, problems with thinking and memory (sometimes called 'fibro fog'), Irritable bowel syndrome, and depression. Women with fibromyalgia may also have painful menstrual periods.
The causes of fibromyalgia are unknown, but problems with the nervous system could be involved. It is estimated that fibromyalgia affects as many as 1 in 50 Americans. Most people with fibromyalgia are women, and most are diagnosed during middle age. However, men and children also can have the disorder.