When I do any cardiovascular exercise and start to get winded, I get a very strong
ammonia like smell
in my nose, like it is coming out of my lungs. This smell is not coming from outside my body, but internally. It's almost like the alcohol smell that goes up the back of your nose when you drink a shot of liquor.
I have had this all my life and just sort of assumed it was the same for everybody, but apparently other people don't have the same thing.
What could be causing it?