If it is Chicken Pox he will get the spots on his scalp. CP is the only viral rash that goes there apparently.

He will be contagious until the spots have crusted over, so another few days. Exclusion from daycare etc is seven days from appearance of spots.

I am really sorry about the birthday, but if it is CP then you might have to shift it to next weekend.

Stock up on calamine lotion and bathes of baking soda help too. Hope he feels better soon xx