>>14341064You have different bacteria within your digestive microbiome at all given points. If you introduce a new bacteria that releases more sulfur, or disrupt your microbiome to let those bacteria thrive over others, your poop is going to stink more or differently than usual. There's also amoeba infections that can give you rank shits of varying stank and texture.
This is a pretty vague response, but hopefully gets the point across. Wishing you luck on your putrid uh oh stinkies.