To me it sounds like it's forming into a keloid scar. I had the same problem when I first got my ears pierced at 12 years old. Some people are more prone to keloid scarring than others. Google "keloid" and see if that's what it looks like. You can get it injected with cortizone, which is what I did, and it will shrink. But if she prone to keloid scars, it will be something she'll have to deal with. I had my appendix out and that scar keloided as well.