What a complete pain! I hear you can get stoma bags with valves on them to help relieve gas build up (and I find the usual filters in normal bags somewhat pointless/non-functional). But I've yet to get my hands on any, and, as such am in the situation where I can be going to the toilet literally every 10 minutes or so to empty sometimes hardly any poo, but a bagful of wind!
My gut is being very loud and gurgly. Output is sometimes thick, but tends to get very fluidy when I've drunk a lot, and in the evenings when my output increases significantly and I am back and forth to the toilet a lot more often than in the daytime. However, my consultant recently prescribed me a course of the antibiotic Metronidazole (400mg tablets) - attempting to kill off gas-producing gut bacteria she thought might be the cause of the problem. This worked very quickly indeed, within a day of starting use I would say, and while using I had no further problems whatsoever with gas or wind. Unfortunately, after finishing the course it took only a day or two for the problem to return as it was before. But I can only thoroughly recommend trying this product if anyone has a similar problem and not been able to adequately deal with by more usual means.......
