Hi There,
I suspect that the main issue here is that your mother in law is under medicated for pain after a huge abdominal surgery.
It is common to have pain from the incision, from gas moving through the bowel, and from adhesions.
It is important to be evaluated for infection and hernia. If her physical exam is normal and her labs are normal, she most likely has postop pain. I sometimes also check a CT scan of the abdomen to be sure I am not missing a deep infection or fluid collection .
But the treatment is time, rest, no heavy lifting, and pain medication. It can take up to six months for uncomfortable and painful abdominal sensations to resolve.
best wishes
Thanks so much for the response labs were normal and she was instructed to take pain meds on a regular schedule now she has developed a new pain which came on sudden and extreme it's in her lower right rib area. Her Doctor ordered an xray which came back normal and has now ordered a bone scan of the area. I'm so glad I found this site!