presents with extremely itchy blisters
. Moreover the lesions appear on the face, mid region of the body and scalp
. So in your case, the location of the blisters is not correlating with the classic areas of chicken pox. Also the blisters appear in different crops, ie are in different shapes and sizes and some may even crust earlier. I suggest you either send some photos of the said lesions or consult your Pediatrician
as this condition is highly contagious and can not be left unattended.
Wishing your child a speedy recovery.