Is she an indoor or outdoor cat? And are there other cats around? It look like it could a wound from a bite or scratch. But don't hold me on that.

First off, don't use anything on your cat that's made for humans unless instructed to by a vet, as it could be dangerous for pets! As you've learned, at best it's useless (as they'll just lick it off), but at worst it could make them sick from ingesting it.

That said, animals can get minor cuts and bumps just like people and generally you don't have to worry. If it's just a small wound, your cat will take care of it on her own. Slight swelling is probably just from the wound area being a bit irritated. I would say just keep an eye on your cat and the wound, check it every now and then to see if it's healing, and to make sure it's not getting infected. Infection would present the same way in a cat as it would a person--noticeable swelling, a pustule forming, development of a fever. It's rather unlikely though, but if it does happen, the best thing to do is to call your vet.

Oh, also, about cat fevers... Some people believe a dry, warm nose indicates fever in a cat, but that's just not true. The only sure-fire way to tell if a cat has a fever is to take its temperature, but otherwise, fever presents the same symptoms in a cat as it does in people: shivering, rapid breathing, decreased appetite and/or thirst, lack of energy/lethargy, and decreased grooming.

So basically, if your cat is eating, drinking, and grooming like normal, then she should be just fine!

Okay, first off, don't give her any more polysporin, it'll cause stomach distress and really isn't good for cats. But wont damage her too bad. Like eating soap for us.

I worked at a vet clinic for awhile, and have had cats almost all my life, so lemme see if I can help Note that I am not a Vet however and cannot give any actual medical advice. This is just a friend to friend basis

First, get yourself an E-Collar for your kitty, that way she stops licking the wound. Here's an example of a comfy one compared to the hard plastics: http://www.amazon.com/KONG-Cloud-E-Collar-Cats-Small/dp/B0045Y1JGQ

Here as well are some important facts about e-collars and cats: http://www.vcahospitals.com/main/pet-health-information/article/animal-health/elizabethan-collars-in-cats/92

Then, get this, its cheap, its useful, it should heal up that wound: http://www.petsmart.com/cat/first-aid/21st-century-antimicrobial-cat-wound-spray-zid36-5192946/cat-36-catid-200044?_t=pfm%3Dcategory

Now, for her wound, it sounds and somewhat looks just like a skin abscess NOT A VET THOUGH here's some general information on that:
http://www.petful.com/pet-health/cat-abscess-treatment-tips/

Its also got info on ways to help heal the issue

Best of luck for your kitty <3