I would try giving her a bath with insecticidal dog shampoo from a pet supplies shop. Some serious diseases can be passed on by fly bites, so you do not want to ignore this - besides they must drive her nu ts.
I also have a question about this. My puppy has tiny flies that are all around her backside and it looks like they try to go into her bottom. I have another dog and they never fly around him only her. Anyone know why?
Give it a treat