Did you know there are more than 240 allergens? Some allergens are rare and others quite common. If you are a sneezer due to pollen, you should close your car windows when driving rather than switch on the internal fan. In other words, draw air from the outside.
Avoid being outdoors between the hours of 5am and 10 am when pollen counts are at their highest. When going on vacation try to visit places with low pollen counts, so that you can enjoy yourself. What type of places you may ask? Try the seaside or ocean areas. Whatever you do stay away from freshly cut grass.