My nose leaks 365 days in a year in Doha. The first thing i wake up in the moring is i sneeze, have itch in my throat, leaky dripping nose and all sorts of things. I usually i am taking Anti-Histamine tablets to get rid of the problem but i hate taking drugs. I also have a Air Purifer at home, the moment i walk out, my misery begins. And yes you are right lots of people are suffering from the same. Maybe A/C contributes more to the problem and ofcourse Dust is the real culprit.. We need greenery here just like Al Ain.