In children allergic rhinitis is most commonly diagnosed health disorders. 20 percent of children are affected with AR. Boys are more affected with allergic rhinitis than girls. The median age of onset of allergic rhinitis seen in 10 years old children, children affected with allergic rhinitis equally in number before and after 10 year old. Most of symptoms starts about 2 or 3 years of age. Commonly it is called hay fever. Allergic rhinitis symptoms leads to some effect on a child’s health, behavior and ability to learn. Those cases of allergic rhinitis not treated well they lead to a host of other serious conditions, including asthma, recurrent middle-ear infections, sinusitis, sleep disorders and chronic cough. House dust mites, pollen from trees and grasses, cats, dogs, milk and eggs are the most commonly found allergens.
Allergy can be either due to genetic predisposition or external agents. When it is due to genetic predisposition, then it is called as atopy. Allergies like eczema, asthma and hay fever are seen to be familial. Atopy has now become common but its reason is not identified. Allergy is due to increased or change in response of immune system to external agents. Conditions like eczema, allergic asthma, urticaria, hay fever and peren¬nial rhinitis are due to external agent or “aller¬gen”. Pollen from trees and grasses, house dust mites, cats, dogs, milk and eggs are most common allergens.
Defination: Allergic rhinitis is characterized by frequent sneezing, nasal fluid secretions, nasal passages obstruction, conjunctival, pharyngeal, nasal itching and lacrimation, all these symptoms occurring in a temporal relationship to exposure of allergen.