I have a colon question

I have a friend who had gall bladder surgery. I referred to her on the liver cleanse site. It's been about 2 months since she had her gall bladder removed. The first month after apparently she didn't have a bowel movement. She was in so much pain. The doctor's didn't know what was wrong. They finally did clean her out somehow. She felt better for about 12 hours and then the same pain came back. She went back to the doctor and about two weeks ago they were going to maybe go in and take out part of her bowel. They said it was diseased. They told her to stop eating food. I had already told her that and to just drink juices. Anyway, she is impacted again.

From what I've read, when you juice fast, your body doesn't have to digest food and therefore can put it's energy into detoxifying. I am wondering how she got impacted again if she was not eating solid food. Was it because her body was ridding itself of accumulated waste and it was pouring into the colon but since she was not doing an enema or colenema it just stayed there. I would really like to understand what caused her to get impacted again. I have a friend who is almost out of nursing school and when I talk to her about eating healthy,and that food can heal you, she thinks I'm a little nuts.

Do you have any knowledge to impart?

Thanks,
Tisha