Type I hypersensitivity

inflammation in nose occurs when immune system overreacts to allergens in air

type of inflammation of the skin

Atopy is the tendency to produce an exaggerated immunoglobulin E (IgE) immune response to otherwise harmless substances in the environment. Allergic diseases are clinical manifestations of such inappropriate, atopic responses.

Pharmaceutical product used as an emergency treatment for anaphylaxis

inflammatory response driven by antigen recognition by antibodies bound to Fc receptors on mast cells or basophils, occurring within minutes after exposure of a sensitized individual to the antigen