DD3, 18mths, has managed to catch a coldsore from me. I did everything I could to stay away from her but I was giving her a cuddle and she moved her face and tried to give me a kiss. Her lip brushed against mine and now she's got quite a large one just under her bottom lip. Does anyone know of anything that I can treat it with? I wouldn't have thought that conventional treatments would be suitable for someone so young.