I also had radiation treatment 26 years ago for cervical cancer at the age of 30 and began having bowel issues within weeks. Now at the age of 56 I have had 3 surgeries for bowel obstructions with 2 to remove part of the intestines and one to clip scar tissue. I am back to being full of scar tissue and I also have strictures and dilated loops in my bowels but Dr doesn't want to do anymore surgery unless it's an emergency. If you suspect that you might have a partial obstruction or stricture/narrowing in the intestines, please look up low residue diet. Anything that is hard to digest, such as nuts, seeds, raw fruits and vegetables and whole grains, can become lodged in the narrow points and cause a blockage. I've had shingles before but that's a walk in the park compared to bowel obstruction pain. I just wanted to let you know to be weary of too much fiber or difficult to digest foods. If your Dr suspects you may have some type of obstruction, the type of test that specifically looks for it is called a CT enterography with oral and IV contrast. Prayers for your health. 🙏