You probably

or someone you know suffers from allergies. Itching witness, swollen, watery eyes and red, stuffy nose signal changes of the seasons in homes and workplaces across the country. What these people suffer from allergic rhinitis or hay fever. The medical term for this condition refers to nasal congestion and itching, the most common symptom.

Hay fever is an allergic reaction. It is the reaction of the immune system to foreign bodies in the air. Hay fever allergies usually refers to the outside, the suspended material such as pollen and molds.

About 15-20 percent of the U.S. population has some degree of hay fever. It is also found in men and women. Usually hay fever is seasonal, but it can last all year if the allergen stays throughout the year. Spring and autumn are the main hay fever.

Hay fever, like all allergic reactions are caused by allergens, /> foreign “invaders” in the body through inhalation, ingestion or skin.
In hay fever, allergens are substances that the air in the respiratory tract (mouth, nose, throat and lungs) through the breathing and the linings of the eyes and ears, sometimes occur by direct contact. Most of the time it is difficult to identify a specific allergen.

Once these allergens come in contact with your respiratory system, producing white blood cells of the immune system antibodies to the substance. This overreaction to a harmless substance is often called a hypersensitivity reaction.

The antibody called immunoglobulin E or IgE, is stored in special cells called mast cells. When the antibody comes in contact with the corresponding antigen, they promote the release of chemicals and hormones “intermediary”. Histamine is an example of a mediator.

What are the effects of these mediators on organs and other cells that lead to the symptoms of allergic reaction in this case hay fever. The most common allergens are pollen in hay fever. Pollen is released by small particles of flowering plants.

It was moved by the wind to other plants of the same kind, the fertilized flowers so the plant again. The pollen of certain trees, grasses and weeds (like ragweed) are most likely to cause reactions. The pollen from other plants are less allergenic.

The time of year when a certain plant species published pollen or “fertilized” depends on the local climate and what is normal for this species. Some species pollinate in the spring and others in the late summer and early autumn. In general, the further north a plant that is /> later in the season, they fertilized.
Variations in temperature and precipitation from year to year on the amount of pollen in the air in a particular season. Other common allergens in hay fever are molds. Molds are a type of fungus that no stems, roots or leaves added.

Mold spores float through the air like pollen to grow until they find a hospitable environment. In contrast to pollen, but the forms were not in season. They are the whole year in most of the United States.

Molds grow both internally and externally. Outside, they thrive in soil, vegetation, and dead wood. Inside, mold (usually called mildew) live in places where not circulate the air, such as attics and basements, damp areas such as bathrooms and places where food is stored, prepared or discarded.

The amounts of pollen and mold in the air is measured daily in many parts of the United States and reports by the National Bureau of allergy.

The pollen and mold, in which people develop allergic symptoms vary greatly among individuals. Pollen and mold are not very helpful in predicting how a particular person will react.

The risk factors for hay fever are family members with hay fever, repeated exposure to the allergen and other allergic diseases such as atopic dermatitis or asthma.

Nasal polyps (small noncancerous growths of the lining of the nose). The allergens that cause symptoms in an individual such as age, he or she. reduce symptoms in some people with allergies, but not all, as they age. physical changes during pregnancy can hay fever worse.


Hay fever