See below. Widespread pain above and below the waist and on both sides of the body. Other common symptoms include fatigue, difficulty with concentration, depression, poor sleep, sometimes problems with the bowels and bladder. Not everyone has these symptoms but the pain is the defining symptom.
Same for any age. History of widespread pain has been present for at least three months. Pain must be above and below waiste and on both sides of body. Pain in 11 of 18 tender point sites on digital palpation (defined points).