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Allergy is a state in which a person becomes sensitized to a particular antigen. The substances which cause allergies are called allergens.

Some of the common allergens which cause allergic reactions are:

Type of allergen

Examples

Inhalants

Pollen, smoke, dust, animal fur, perfumes, CO2, SO2 , etc.

Contactants

Paints, cosmetics, pollutants, metals.

Food substances

Egg, milk, prawns, wine, fish

Infectious agents

Bacteria, fungi, moulds, viruses

Drugs

Asprin, Penicillin, Tetracycline

Physical agents

Heat, cold, sunlight, radiations

Other agents

Dandruff, honey bee, wasp, pets, feathers

Vaccines

Typhoid

 

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