I don't know about smells by I am hypersensitive to sound -- it's like I have supersonic hearing. I hate it. Every noise annoys me and I can hear things others can't hear pretty easily -- I'll hear music in a car that's a mile away. I'm especially sensitive to thumping noises (like bass/drums in music). My pdoc said that such a sensitivity can go along with bipolar. Not sure that translates to smell, though?