assuming your diagnosis is correct and he does have a cold sore (herpes simplex) it will be his immune system that finally makes it resolve not really anything that you are currently using. there are some topical and oral (prescription) medicines that can be used but they would have been more effective when the lesion first came out. some other skin lesions mimic the appearance of a cold sore. one in particular would be impetigo. this is a skin infection due to staph or strep that often requires antibiotics either topical or oral (or both depending on the severity). any self-diagnosed skin condition that fails to respond to home treatments should be evaluated medically so that it can be professionally diagnosed and treated. not something that can be blindly managed in this forum. the fact that he has bumps and blisters covering his enitre face is clearly a reason now.
what are the tiny blisters on my four year olds face? . two weeks ago my son got a cold sore i can not get it to go away! two days ago i noticed he now has little red bumps/ blisters covering his face now! i have put a and d ointment on his face and gave him benadryl and cold sore medicine he is not allergic to anything! please help!