When I first came to Bangkok I seemed to wake up with a dry mouth and stuffy nose. I assumed it was the pollution, but it gradually went away and I've been mostly fine since. However, at certain times of the year when it is really smoky out in the city, I do get a stuffy nose, a bit of a sore throat, and sneeze a lot.
Does anyone else notice this in Bangkok? I've heard it is the rice farmers burning their fields, and not actual car/factory pollution.