I don't really expect any solutions, to be honest. This has been going on for over 30 years.
I get frequent embarrassing noises from my rectum that can sound like I'm passing wind, but can also be rumbles, squeaks, bullet-type noises(!) etc. I'm so tired of it, after so long.
I also get odd noises at the left side of my waist, as if I need to insert a tap there to relieve some pressure!
The only time it's ever eased off has been when I've been pregnant, which makes me wonder if it's some kind of structural issue. It's not painful or anything.
I'm fit and healthy, pretty good diet etc. I have tried to pinpoint dietary causes so many times - kept food diaries etc - but nothing has ever jumped out.
I'm usually fine in the morning, but it's the afternoons and evenings when it can start happening. I end up completely distracted from what I'm doing, as I'm trying to shift around to avoid making a noise. Sometimes it works, sometimes it doesn't, but it means my body is tensed up an awful lot of the time.
After all this time it just feels like it's part of "me" and I'll never get a solution, but just posting on the offchance there might be someone out there who has experienced similar.