I had a few cavities, so the dentist put anesthesia into my gums, and also she used latex gloves, and some blue UV light. It started right after the fillings were done:

Next to my lip was this huge white THING. With pus and the works.
Yesterday I let it get some air, so it turned dark red and looked like an enormous scab.
Today it got even bigger, and GREEN and it hurt a lot, so I put a band-aid on top of it, since it looked really gross. I didn't want anybody to see it.

What should I do? What do you think it is? Has anybody experienced this before? Are there any home-made remedies? Please, help? Thank you.

I can't even imagine what the blemish might be and don't think it was generated by anything the dentist used. It would not have come up so fast. Sounds like you have a cold sore already developed. The green colour is interesting, again, stumped by your description. What you should do is call your dentist, explain, or go to the emerg of your nearest hospital and have it diagnosed.

Tick