Originally Posted by wipekitty

Ever use a neti pot? I've avoided a few (though not all) possible sinus infections by getting the gunk washed out. One theory behind the neti pot is that it can help wash out the gunk that accumulates in your nostrils and sinuses, which can supposedly help with pollution and pollens.

The dust mask might help. There are also cycling-specific pollution masks available (primarily from UK/EU/Asian retailers). I've seen them used by bicycle commuters in polluted areas, such as London.