I know a child who had "fibromyalgia" and "chronic fatigue." It took a while to sort out everything causing those symptoms. T4 & T3 thyroid hormones were raised. She got on a gluten & dairy-free diet, and they also found functional nutritional deficiencies and she went on Metanx and other supplements. Also took things to help mitochondria... and narcolepsy/sleep disorder medications. She is much better now some years later. A medical doctor specializing in Anti-aging medicine helped even though she was so young.

Jaspar