hello i read your question and can understand your concern i would like to ask some more things * is he also having blurred vision during such attacks? *any family history of such attacks? if i would be his treating doctor i would order his labs like complete blood count first and according to that CBC report would go for further investigation because in my opinion and the symptoms he is having that could be PLOYCYTHEMIA VERA So i would suggest that take him to pediatrician and do check with him i hope my answer will satisfy you good luck and tc