Help Honduran Milk Snakehas a bump

[El diablo]

So i got this 8 yr old honduran milksnake named el diablo, i brought him to a local reptile specialty store Underground reptiles to check out some concerns i have. He has a small bump on him that is discolored and underneath the scales it seems, the scales too seem a little warped, they told me it might be because he got pinched or it could be a parasite,they also told me he was pretty skinny and assumed he wasnt eating well, and to watch and see if he gains weight.Shortly after he was fed 2 rat pups which he regurgitated, but im pretty sure i made a mistake of feeding him too much at 1 time even though i was told to feed him that amount. I talked to the guy who i got him from who told me he had the bump for a long while and he had been eating well, which has me concerned for how skinny he is. Overall he is a wonderful snake very very good temperment for a honduran and very pretty, but id still like to hear suggestions on what to do to help or what the bump could be.
Also sorry for bad grammar i needed to write this super quick.

[Minkness]

Please post photos so people can see what his body condition is as well as the bump that you are talking about.

Regurgitation could be from stress, parasites, low temps, high temps, ect. So please also give a run down of your husbandry.

[Andy_G]

Time to go to the vet.