Cedar pollen, for those with allergies, causes burning eyes, runny nose, itchy ears and excessive sneezing. Cedar pollen allergies are typically much worse than ragweed. This is due to the biochemical structure of cedar pollen's protein coat, which appears to have properties that make it unusually noxious. The sheer quantity of the grains compounds these problems.
Pollen is a fine coarse powder containing the microgametophytes of seed plants. Pollen grains have a hard coat that protects the sperm cells during the process of their movement from the stamens to the pistil of flowering plants.