Hi doctor. my kid is infected with chicken pox one week back. Gave her anti viral medicine and blisters are healed. Two days back, she got one big blister on back of neck and she is in pain. doctor said it can be a secondary infection and suggested antibiotic.. we started giving her antibiotic. Slightly her side of neck is swollen too. and she complains of pain. what should I do? tried giving ibuprofen, pain will be relieved for 6hours and again she starts getting pain. shall I continue giving ibuprofen?