Allergy Symptoms Factors of Allergies

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What causes allergies?

You have an allergy when your body overreacts to things that don't cause problems for most people. These things are called allergens. Your body's overreaction to the allergens is what causes symptoms (see the box below for a list of symptoms). For example, sometimes the term "hay fever" is used to describe your body's allergic reaction to seasonal allergens in the air, such as grass or pollen. Keeping a record of your allergy symptoms over a period of time can help you and your doctor identify which allergens cause you to overreact.

Causes and Risk Factors of Allergies

The fundamental cause of allergy is still not known. The problem has a tendency to run in families. An allergic individual 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 part as well. Evidence of this is the fact that infants who are breast-fed are less likely to develop allergies than bottle-fed babies.
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. The most common allergic diseases are allergic rhinitis, non-allergic rhinitis, asthma, allergic dermatitis, contact dermatitis and urticaria. (Allergic rhinitis is the most common of the allergic diseases and the main focus of this health profile. More comprehensive information about the other conditions may be found under that particular 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.

Severe Allergy Symptoms (Anaphylaxis)
Anaphylaxis is a rare, life-threatening emergency in which the body's response to the allergen is sudden and affects the whole body. Allergy symptoms may begin with sudden itching of the eyes or face and within minutes progress to more serious symptoms, including:

Varying degrees of swellings that can make breathing and swallowing difficult
Abdominal pain
Mental confusion or dizziness

Allergy Fact
It is estimated that 50 million North Americans are affected by allergic conditions.
The cost of allergies in the United States is more than $10 billion dollars yearly.
Allergic rhinitis (nasal allergies) affects about 35 million Americans, 6 million of whom are children.
Asthma affects 15 million Americans, 5 million of whom are children.
The number of cases of asthma has doubled over the last 20 years.

Tags: Allergy Symptoms


  1. I'm allergic to peanuts. Until a year or so I was craving for beer and peanuts, but now, thanks to my cousin, I can enjoy having them. He told me that North Carolina Agricultural and Technical State University researchers have discovered allergen-free peanuts through a simple process. The allergy-free peanut is the first peanut innovation available in a portfolio for commercialization from N.C. A&T. It was such a relief when I've found out. Nutritionally, peanuts are very important. I wish I could help my mom, though. She's allergic to flowers. Is there something that would help her?

  2. Which type of allergy she have ?


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