I'm super ignorant to health issues with BP (thankfully) but we're going to need a loooooot more info, as IBD is not a word to throw around lightly:
where did the snake come from?
what's the husbandry run-down?
when did the snake last eat and what?
are the bumps soft or hard to the touch?
what makes you suspect impaction?
what other symptoms are there?
is the snake even alive??
i can tell you now that this is likely not IBD, as most people throw that out there all the time when a snake is sick with 0 evidence of IBD. sometimes the first sign of IBD is an RI. i suspect an infection, likely a bad one. but again, i'm no expert.
that snake needs a vet like yesterday.