Is there any sign of swelling around the back end lumps and bumps?
I'd say that several soaks would be better 15 min a day for 5 days or so.
If there is and after soaks I'd say a vet maybe in order. If there isn't and everything seems smooth and normal I may try a "rat lax" 1ml of mineral oil per kg injected into the next meal. Best to check with a vet in either case. I am not a vet and am just repeating what I have read. If you want PM me and I can scan the page for you.
ref. "What's Wrong with My Snake" John Rossi dvm
How is your humidy? You might check and bump it up some. Also have you had urinates?
good luck
Alex