Have they checked to make sure you haven't got an abcess. When I get one I have no outward symptoms they can see until just before it is bad enough to burst. The only symptom I get is initially a sharp stabbing pain lasting less than a second when I bend over, then after few weeks it becomes achey.
I've had two abcesses and it was where the adhesions from the previous surgery had become infected and then bowel contents had small leak which caused the abcesses. Antobiotics can reduce the abcess down so symptoms go away but unless it is completely dealt with it will come back and so symptoms will return when it builds up again.
They should be able to see them on an ultrasound or scan.
Crohn's dx 1989, loop ileo 1992, end ileo 1992. Arthritis developed 1990 Stoma abcess 1995. Azathioprine started 1995. Panprocolorectomy 1999. Stillbirth 2000, antiphospholipid syndrome dx 2000. Flare up 2004, stoma abcess and strictoplasty 2004. Low blood pressure dx with impaired kidney function 2006, fludrocortisone pres. flare up 2010, steroids, Humira, codeine.