Hi,
If your son suffered a traumatic
brain injury (and that is certainly what it sounds like with him being knocked out) then, the
dizziness is more likely than not due to the aftermath of that blow to the head.
He could be suffering from what we refer to as a postconcussive syndrome. I don't know that the
nosebleeds can necessarily be tied together with the TBI but certainly, if he has PROFUSE nosebleeds and he is anemic as a result of the blood loss then, that can also be an explanation.
He needs to get blood work which can easily detect the presence of
anemia or not and if he's not been seen by a TBI specialist or at least a pediatric
neurologist for the TBI you should take him to one for evaluation and interim review of his case.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. Dariush Saghafi, Neurologist