Earlier quoted context omitted.
Wait, hold on. Are you saying from lingering smell you're able to determine that there's pathology?
It's not difficult for many conditions. Digested blood has a metallic and vile odor. Ketosis and diabetes can cause acetone-smelling breath. Kidney disease can cause ammonia body odor. Liver disease can cause a fishy, musty smell. Unhealthy diets and GI issues can cause bad odors. In the past, I have often wondered what is wrong with people given how badly they smelled in the locker room or after leaving a restroom.…
My sweat when I exercise very intensely, smells like ammonia. Probably since I was 18 (before I played waterpolo, so I can't tell). Normally it does not, only with very intense exercise (zone 4 or 5).
Edit: a kagi search suggested this is normal