My mother could smell UTIs before family members knew they had them, and she can smell stomach problems on people’s breath. Idk how she does it, but she says those two smells are VERY strong. I wonder if it’s similar?

I have chronic kidney stones and can 'taste' when my kidneys are failing. Kinda metallic on my breath.

My pee smelled weird when I was going through fulminant liver failure. I think in my case it was bilirubin. I wouldn't be surprised if I was sweating it out as well. My whole body was stained yellow. It definitely has a smell though.