Have a symptom?
See what questions
a doctor would ask.

Causes of Pollen allergy

Pollen allergy: Related Medical Conditions

To research the causes of Pollen allergy, consider researching the causes of these these diseases that may be similar, or associated with Pollen allergy:

Pollen allergy: Causes and Types

Causes of Types of Pollen allergy: Review the cause informationfor the various types of Pollen allergy:

Causes of Broader Categories of Pollen allergy: Review the causal information about the various more general categories of medical conditions:

What causes Pollen allergy?

Article excerpts about the causes of Pollen allergy:
Plants produce microscopic round or oval pollen grains to reproduce. In some species, the plant uses the pollen from its own flowers to fertilize itself. Other types must be cross-pollinated; that is, in order for fertilization to take place and seeds to form, pollen must be transferred from the flower of one plant to that of another plant of the same species. Insects do this job for certain flowering plants, while other plants rely on wind transport.

The types of pollen that most commonly cause allergic reactions are produced by the plain-looking plants (trees, grasses, and weeds) that do not have showy flowers. These plants manufacture small, light, dry pollen granules that are custom-made for wind transport. Samples of ragweed pollen have been collected 400 miles out at sea and 2 miles high in the air. Because airborne pollen is carried for long distances, it does little good to rid an area of an offending plant--the pollen can drift in from many miles away. In addition, most allergenic pollen comes from plants that produce it in huge quantities. A single ragweed plant can generate a million grains of pollen a day.

The chemical makeup of pollen is the basic factor that determines whether it is likely to cause hay fever. For example, pine tree pollen is produced in large amounts by a common tree, which would make it a good candidate for causing allergy. The chemical composition of pine pollen, however, appears to make it less allergenic than other types. Because pine pollen is heavy, it tends to fall straight down and does not scatter. Therefore, it rarely reaches human noses. (Source: excerpt from Something in the Air Airborne Allergens: NIAID)

Related information on causes of Pollen allergy:

As with all medical conditions, there may be many causal factors. Further relevant information on causes of Pollen allergy may be found in:


By using this site you agree to our Terms of Use. Information provided on this site is for informational purposes only; it is not intended as a substitute for advice from your own medical team. The information on this site is not to be used for diagnosing or treating any health concerns you may have - please contact your physician or health care professional for all your medical needs. Please see our Terms of Use.

Home | Symptoms | Diseases | Diagnosis | Videos | Tools | Forum | About Us | Terms of Use | Privacy Policy | Site Map | Advertise