Weird red scales on BP?

[Bogertophis]

The vet gave me a broad spectrum antibiotic i think, But nonetheless it wont hurt to soak him in vetericyn too better safe than sorry!!
There may be a limit but you guys probably helped me out and gave me information a ton more than my vet ( not that i mean they didn’t, I appreciate all that they did despite their little knowledge in BP’S but they did not get into specifics at all or ease my worries ) so thank you all! ^^

Well many vets just don't see enough snakes to get experience with them, so maybe try to share (tactfully) what has been suggested & whatever seems to be working so your vet learns too.

Depending on what this is, the topical medications might not penetrate the skin enough to cure an infection, if that's what this is. (the swelling suggests infection, to me) And if you got a broad spectrum antibiotic cream from the vet, you don't likely need the others (OTC products that we suggested) in conjunction.

On the other hand, IF this is a burn (if you find where & how this might have occurred?) a better topical medication would probably be Silvadene cream. Safe & used as directed topically on snakes+.

"SILVADENE Cream 1% (silver sulfadiazine) is a topical antimicrobial drug indicated as an adjunct for the prevention and treatment of wound sepsis in patients with second- and third-degree burns"