question: my 5 year old started complaing of raised blister like bumpa on his back. they have crusted up and i thought nothing of it, now a week later he brought to my attention that they have the same type of bumps on his chest. i dosed him with bendryll and put hydro cort cream on them and was wondering if i should be concerned with ckn pox...he has the ckn pox vacc and does not have any fever at this time.