hi it could just be a reaction to the meds as bullies are known to have sensitive skin. has Aurora used that brand of flea meds before? if it doesnt calm down or gets worse soon id phone the vet that prescribed them to you for more information.
also - if its one that you squirt onto the furr rather than a tablet im not sure about others but my vet says not to bathe them for a while after applying as your basically washing the treatment straight off and might as well have not used it. xx