The Causes and Risk Factors of Allergies


The fundamental cause of allergy is not yet known. The problem tends to run in families. An allergic persons is more likely to have relatives who are allergic than would be expected on the basis of chance, but non-hereditary factors apparently play a role too. The reason an individual becomes sensitive to some substances and not to others remains a mystery.

Individuals can be affected by a variety of allergic diseases. Most often, allergic diseases are allergic rhinitis, non-allergic rhinitis, asthma, allergic dermatitis, contact dermatitis and hives. (Allergic rhinitis is the most common of allergic diseases and the main purpose of this profile health. Further information on other conditions May be found within this term.)

Allergic rhinitis is a general term used to apply to anyone who has allergy-based symptoms. Allergic rhinitis can be a seasonal problem (commonly known as "hay fever" or pollen allergy) or a year-round problem (commonly known as perennial allergic rhinitis). Hay fever or seasonal allergic rhinitis is caused by allergy to pollens of trees, grasses, weeds or mold spores. Perennial allergic rhinitis is caused by house dust, animal danders, mold and some foods.

Asthma is caused by intrinsic and extrinsic (inhaled) factors. Intrinsic factors are pollens, dust, dust mites, animal fur, animal dander or feathers. Extrinsic factors are respiratory infections; a cough, cold or bronchitis; exercise and tobacco smoke or other air pollutants, and can be caused by an allergy to a particular food or medication.

Urticaria, also known as "hives", is caused by allergy to foods, such as nuts, tomatoes, shellfish and berries. Hives can also be caused by medications, such as aspirin and penicillin.

Contact dermatitis is caused by exposure to certain plants (such as poison ivy or poison oak), cosmetics, medications, metals and chemicals.

Eczema, also known as allergic dermatitis or atopic dermatitis, can be caused by foods or other allergens.

0 komentar:

Bloggerized by : Blue Weed by Blog Oh! Blog .