hypersensitivity

hypersensitivity to cold

an inappropriate and excessive reaction to an allergen (as pollen or dust or animal hair or certain foods); severity ranges from mild allergy to severe systemic reactions leading to anaphylactic shock

an itchy skin eruption characterized by weals with pale interiors and well-defined red margins; usually the result of an allergic response to insect bites or food or drugs

hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity

hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from prior contact with a substance

rhinitis caused by an allergic reaction