Allergic rhinitis is a few different symptoms, mostly in the nose and eyes, caused by airborne particles of dust, dander, or plant pollens in people who are sensitive to these substances.
When these symptoms are caused by pollen, the allergic rhinitis is commonly called hay fever.
Allergies are caused by an overly sensitive immune response. The immune system under normal circumstances protects the body against harmful substances such as bacteria and viruses. Allergy symptoms start when the immune system reacts to substances (allergens) that are normally harmless and in most people do not cause an immune response.
When a person with allergies inhalebreathes in an allergen such as pollen or dust, antibodies are made. When the antibodies are stimulated by pollen and dust, histamine and other chemicals are released. This causes itching, swelling, and mucus production. Symptoms vary between people. Very sensitive individuals can experience hives or other rashes.
Hay fever involves an allergic reaction to pollen. A similar reaction is produced with allergy to mold, animal dander, dust, and similar inhaled allergens.
The pollens that cause hay fever differ between people and from region to region. Large, viewable pollens are not usually responsible for hay fever. Tiny, hard to view pollens are usually what cause hay fever. Examples of plants normally responsible for hay fever include: Trees (deciduous and evergreen), Grasses and Ragweed. Just to name a few. The amount of pollen that is airborne can determine whether hay fever symptoms develop. Hot, dry, windy days are more likely to have increased amounts of pollen airborne than cool, damp, rainy days when most pollen is washed to the ground.
Some disorders may be related with allergies. These include eczema and asthma.
Allergies are common. Your genes and environmental factors may make you more prone to allergies.
Exams and Tests
The physician will give you a physical exam and ask you questions about your symptoms. Your past symptoms is important in diagnosing allergic rhinitis, including whether the symptoms differ in relation to time of day or the season, exposure to pets or other allergens, and diet changes.
Allergy testing may show the particular allergens the person is reacting to. Skin testing is the usual method of allergy testing. This may include scratch, patch, or other tests.
If your doctor determines you cannot undergo skin testing, the RAST blood test may help determine which allergens you are allergic to.
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