Your son's sleep need for what appears to be excessive sleep may be something that he has got used to, almost a habit. However his need for extra sleep does seem to be excessive. It is unusual for boys of his age to need to sleep in the afternoon. It would be a good idea to ask his paediatrician to see him with a particular view to making sure that your son is not anaemic and that his thyroid tests are normal. The paediatrician may want to do some additional tests if thought necessary.
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