help! my daughter's legs are all scabbed up!

my 10 year old daughter is one of those people who bugs love! when we go outside (and we live in florida) she is the only one to get bitten by mosquitos. if there is are fleas (or a major outbreak!) she is the one that they find.
consequently, her legs are always covered with bites, and then scabs.
first, is there anything that she can do to make herself smell not so good to bugs?
secondly, what can we do to speed up the healing time when (and she will!) she scratches them to scars?
third, what can we do to help the scars disappear?
thanks so much for the help!
suzanne