Yes, my son has headaches now. Is it too late to ask for him to get medication? Within 2 to 3 days of his rash appearing, I took him to the doctor;so I guess it's too late to start him on anything. I just feel so bad for him and now i'm worried about myself. Will this come back? And if so, what is the course of action? Do I let it take it's course or take him back immediately so that he can be placed on medicine?