I would get some Vetericyn, if you have a Petco nearby they sell it in the store, if not you can buy it online. It's a topical antiseptic for wounds in a water-based gel, so it won't soften scales or cause them to slough off like Neosporin can. Normally you spray it on the wound but she'll probably freak out about being sprayed on her head, so I'd put it on something like a Q-tip and use that to apply it to the wound.
It will take a few sheds but it should heal up just fine.