Fibromyalgia is chronic pain throughout the body that primarily affects the muscles and nerves, according to the National Institute of Arthritis and Musculoskeletal and Skin Diseases. It is not the same as arthritis pain, which is felt in the joints between bones. Fibromyalgia causes deep-tissue soreness instead.
Discomfort is commonly felt in areas known as tender points, such as the lower neck and shoulders, throughout the back and hips, and along the arms and legs, explains the NIAMS. Frequent headaches and menstrual cramp aches are typical symptoms of fibromyalgia. Aside from direct pain, tingling of the hands and feet, or complete body stiffness, is prevalent as well. The widespread pain ultimately results in constant fatigue.