That is what everyone with a snake that has a burn saysSadly it was 100% preventable with proper research and equipment.Ive had a male banana ball python for 2 years now and haven't had any problems until now
So unplug your heat pad, change your substrate to paper towel and wait and see how bad it gets over the next 24 to 48 hours, burns can change quickly depending on the severity.
Than depending on the extent you are looking at either a mild burn or one that requires a vet visit during which you will be prescribed silver silvadene and possibly antibiotics.