You should probably have your under the tank heat pad on, and when its warm put your hand on it to see how hot?
The situation makes it seem like a burn, but i'm not a vet so I can't really help. Sorry..
If you have silvadene cream, i'd put some on it. If you don't have any, someone told me about this website that sells some.
http://www.mountainside-medical.com/...ilvadene+cream