Many people are very hard to avoid allergies, except wandering in the desert, so stay on top of the snow-capped mountains or alone in an air conditioned room. Allergic rhinitis or “hay fever” is a very common disease, affecting 15% of people, from adults to children.
The disease can occur seasonally or year-round. According to the season, in early Spring, Summer or early Autumn that the causes are grass pollen or mold spores. According to year-around, the causes are dust in house, cat hair dog hair.
So far, there have been several theories but no satisfactory explanation why all the excitement go watch the cherry blossoms that many people enjoy safe, others are itchy eyes, sneezing, always clean nose eyes. If one parent is allergic, the child has a 40% risk; all of them, the child is the risk will be higher, up to 60%.
It is suggested that the disease is increasingly happening much because of civilized life, healthy people, the immune system more effective. And this system with high career conscience, met overkill with the substance that is normally considered harmless.
Recently, the World Health Organization says as many as 25% of the population of highy industrialized countries are allergic rhinitis.
Dr. Donald Leung, Head of the Department of National Allergy Jewish Medical and Research Center, Denver puts the question is “have something in Western life increases the number of allergies”. Because the people of India, Indonesia little reaction, whereas the proportion of Americans allergic to increase 31% from 1985 to 1995.
Fortunately, science has shed light on a number of causes of allergies as well as measures taken to prevent, treat quite effective.
It should also distinguish allergy (Allergy) with hypersensitivity phenomena (Sensitive). A tear uncomfortable when sitting near the smoke was too sensitive to smoke, not allergic. Also, allergies are more complicated.
In allergic effects, at least three participants: cause allergic substances (allergens), antibody (Antibody) and intermediate chemicals Histamine.
a-allergens are pollen of flowers and trees, dust particles and microorganisms hovering in the air.
b-quality IgE antibodies present in the blood is a component of the immune system to protect the body when allergens penetrate.
c-Chemical Histamine is a product of the interaction between allergens and antibodies. Histamine dilates blood vessels in the nose, fluid leaks and lead to the signs, symptoms of discomfort of the patient.
The pollen grains are often the culprit causing a chain reaction in allergic rhinitis. Depending on local, seasonal options that agents are more or less.
In early spring, with pollen from flowering plants; Last spring pollen from grass; then in summer pollen from grass pollen incense; autumn allergies because of mold spores. With warm weather, try hovering in the air sometimes take months.
Pollen grains are small round or oval, but the main function is reproduction through pollination, plants to enrich the earth. Pollination can be in the same tree or by wind and bees from flower butterfly charm given to other flowers.
The noteworthy point is not fragrant pollen of trees to wind pollination sent back to cause more allergies than pollen from the bees fly from flower to flower nectar. Pollen usually has much in the morning and just a few dozen particles is sufficient to cause the reaction.
Pollen in the wind bounces away, for hundreds of miles, it is difficult to want to run away, but fell trees in the garden allergenic pollen is also from the garden.
Raweeds is the culprit allergen largest in North America, and to the Bermuda grass, pollen oak, ash , elm, pecan.