E.W.
You may call your pedi and see if you can get a prescription for Valtrex. I am not sure if your little one is to little, but it is worth a try. I take it when I see one coming on and it cuts the time it is there in half or more. My mom used to out powdered allum on a sppon with a little bit of water and then put it on my lip. You can get powdered allum in the spice aisle at the grocery store. I am not sure if it made a difference in the cold sore but it suppose to dry it up. Good luck, poor little baby!