I have exactly the same building of gas at about 3 every day with increasing distention and discomfort. No gas comes out through these hours. I have had my pouch for 2 1/2 years. This problem is fairly new; 2 months. At about 7 p.m. I start passing gas over an hour or so and the distention subsides only to begin on the same time frame every day. I feel there is a mechanical problem behind the old ostomy; a kink or something. CT scan showed no obstruction but mentioned a soft tissue collection behind the old ostomy. Doctor didn't seem concerned. I hate this every day. My diet is the same as it has been for 2 1/2 years. I take a prebiotic. Can't afford VSL3. My surgeon is very hard to see and seems rather uninterested in my daily dilemmas. I am awaiting a new GI.