Cat only thing I know about
scar tissue is in many instances its best if left alone for some people. They can only remove so much anyway, secondly it will form again and possibly come back worse. Some people form scar tissue much more than others, I am one of them. If your dr says he really doesn't not want to remove that piece of intestine, then I would have to abide by what he says. Lets face it, we need every inch we have.
I would try to give it a little more time and then if its no better, get back in to see him and see what he can offer in the pain dept. Perhaps a trip to your PCP might be in order to get some pain meds. Good luck... Susie