L.S.
Putting something on her chin that is safe and doesn't taste great could help....by the sounds of it, you need something healing there anyway. If you know an Arbonne rep...ask about the FC5 skin conditioning oil...although it isn't advertise for this, there are many cases of healing this sort of thing...including my husbands excema and psoriasis management...it could help heal it within a couple of days...it doesn't taste terrible, but she may not like it and it is certainly safe. Overall....I find that most of this stuff is a phase and if you focus on it, it could get worse...try using some sort of distraction. It sounds sore....maybe kiss her chin to distract.