I've been noticing recently (over the last 6 months or so) that I have virtually no sense of smell. I don't have a cold or hay fever although I often get a sniffle or two first thing in the morning. Every now and again I get a really strong whiff that almost makes me gag and then nothing again. I also have phantom smells - I could smell sewers all day yesterday and no-one else could smell it. Ditto a very strong smell of petrol when I first get out of my car - DH swears it isn't there. Any ideas what's going on? Not worried just confused...