Borrowed from the BBC web site :-)
It might help some people
If you have hay fever, there are steps you can take to avoid exposing yourself to pollen:
Keep an eye on the pollen count (often included in weather reports) and stay inside as much as possible when it's high
Wear wrap-around sunglasses to stop pollen getting in your eyes
Saline douches or a little Vaseline applied inside the nose will reduce symptoms
Keep car windows closed and switch on the air conditioning to prevent pollen entering the car
Keep bedroom doors and windows closed in mid-morning and early evening when pollen levels peak
Avoid areas such as parks or fields, particularly in the early evening when there's a lot of pollen floating at nose level
Get someone else to mow the lawn and don't lie on freshly cut grass