Hello,
Yes, certainly your kid is too much tired that he goes to sleep for such a long time. Excessive
fatigue and leg pains are seen in the following conditions:
1) Viral illness with muscle pains or myalgias
2) Psychiatric conditions like
depression and anxiety
3) Hypothyroidism
4) Infectious mononucleosis
5) Obstructive sleep apnea
6) Anemia
7) Juvenile arthritis
8) Rare cases it may be due to blood cancers like
leukemia and lymphoma
Please take your kid to a
pediatrician for detailed clinical evaluation in person. But please don't worry as in most of the cases, it would be due to an infection like mononucleosis that can be completely cured.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Pallavi M., Anesthesiologist