The first year it was not to bad until my body started reacting to mango pollen, back in Cambodia. Since then I have hay fever every year again. I wasn't tested here for what pollen are the problem - is there actually any test available in hospitals here?
And a bit of research (aka google) shows I am not the only one. Read the "Hayfever in Thailand" thread here
What is your experience? Any allergies? Does medicine help (I am taking Telfast 180mg with little success)?