Allergic rhinitis Causes and Risk Factors

Allergic rhinitis
Causes and Risk Factors
The exact cause of allergic rhinitis is not known, but genetic factors are important. It says people with predisposition to allergic reactions that have an "atopic". In other words, it shows a great reactivity to contact allergens, banal and harmless to most of the population. They can give rise to different manifestations: allergic rhinitis, asthma, hives, eczema, food allergies, etc.., Which can occur isolated, simultaneously or sequentially, depending on the person.
An allergy is an abnormal and excessive reaction of the immune system, whose role is to protect the body against pathogens (bacteria and viruses). Allergy symptoms are caused by immune response against a foreign substance (allergen).
Hay fever is an allergic reaction to pollen. A similar reaction occurs in an allergy to mold, animal dander, dust and other pneumalergeni. The amount of pollen in the air influence symptoms. Hot and dry air generally contains a larger amount of pollens than cold air and moist.

 
Risk Factors


 - Heredity plays a role in allergies, including allergic rhinitis. If one parent suffers from an allergy, the risk to children is about 50% and if both parents are allergic, the risk of developing an allergy to the baby reaches 80%.
 - Repeated exposure pneumalergeni
 - Exposure to cigarette smoke, especially early in life, but also to other respiratory irritants
 - Abuse of topical decongestants (nasal sprays) can aggravate nasal mucosa, thus leading to the occurrence of rhinitis