Definition of Pollen

1. 10 Common Allergy Triggers Slideshow Pictures
2. Take the Quiz on Allergies
3. Nasal Allergy Relief Slideshow: Products That Work

Pollen: Small, light, dry protein particles from trees, grasses, flowers, and weeds that may be spread by the wind. Pollen particles are usually the male sex cells of a plant, and they are smaller than the tip of a pin. Pollen is a potent stimulator of allergic responses. It lodges in the mucous membranes that line the nose and in other parts of the respiratory tract, causing irritation and histamine reactions.

Need help identifying pills and medications?
Use the pill finder tool on RxList.