I finally know why people with irritable bowel smell so bad.
I found that there are three stages of IBS. The first stage is that I keep farting but I can hold it in. The second stage is that I can’t hold it in. The third stage is that I can’t feel the gas. Then in the third stage, people will smell bad. I found that I could feel the urge to breathe when I was relaxed (I thought about it for about three or four minutes in a row), but not when I was nervous (at school). Then at this time, part of it would leak out on its own and become Smelly fart, the other part is still in the body causing the body to smell. Then my whole body smells like shit or sewer, but I may not be able to smell it if I get used to it (I thought I was better), but others will smell it, and the smell is very strong. Sometimes you can smell it even when you walk from indoors to outdoors.