My 13 month old son started developing spots on monday on his legs they spread to his bottom / nappy area, they have formed into blisters some of which are starting to scab. They are all different sizes some are quite big. He has some on the ends of his fingers and a few on his arms as well. Dr thinks it is chicken pox but isn't it unusual to not have then on torso and face. They do seem to itch at times as he rubs his legs on the carpet. He is having no trouble eating or drinking.