As far as the way you smell goes, I think it depends on what you eat. The more sugar or caffeine I consume the worse I effect other people. Like I said earlier, I'm not a doctor, and my kidneys are fine as well. But I have smelled an ammonia like smell coming off of myself and I've seen how others react to it, coughing and itching. I don't know the how's or why's, but this is one symptom of our condition. Of that, I am sure. Google "how to reduce excess ammonia in a persons body"
, and it will give you a list of things you can do and eat to help you in this area.
I believe that we emit ammonia from our bodies due to to the imbalance in our stomach and digestive track. Are bodies cannot get rid of the excess ammonia properly so it comes out through our pores causing people to sneeze and itch. I'm not a doctor, but I've had this long enough to know this is part of our problem.