What are the indications of Allergic Asthma?
Allergic asthma is the most common type of asthma triggered by an allergen. An allergen is any substance that causes a hypersensitivity reaction. The common allergens are inhalant (dust, pollens, fungi, smoke, perfume, or odors of plastic), and sometimes they are food, drugs, infectious agents, physical agents, or through contact with certain things. The allergens do not affect everyone but only affect hypersensitive people to the allergens that trigger a response starting in the immune system.