Welcome to HCM. I have gone through your question and understand your concern
Increased sleep and lack of energy could be due to thyroid hormonal
problems. It could also be due to sex hormonal changes that are seen in puberty
. Please consult a doctor and have your daughter evaluated.
Hope I have answered your query. If you have any further questions I will be happy to help
With warm regards,
Dr Ajish TP (MD,DM)