E.E.
Have no fear!! Both of my children had them 3 times and they have them bad as in you couldn't tell where one blister started and the other. The worst was when they ahd they in the mouth. Please be careful that he doesn't scratch and then touch his eyes. If he were to get them in the eyes, it could cause blindness.The oatmeal bath is the best!!Try making oatmeal paste and rubbing that on him like cream and just let it set.You might try "itch" cream that is used for bites.