Does she wear a fly mask? The flies are bad here at the moment, Ellie has been wearing hers, much to her disgust and has spent ages trying to get it off, to no avail!
Nettex Itch Stop Salve, but try on a small area first in case of reaction, I put it on my beast everywhere and right up to his eyes and in his ears with no ill effects, keeps the buggers away, again be careful as some peoples horses react to it.