Atopic: A predisposition toward developing certain allergic hypersensitivity reactions. Atopy may have a hereditary component, although contact with the allergen must occur before the hypersensitivity reaction can develop. SLIDESHOW Could I Be Allergic? Discover Your Allergy Triggers See Slideshow From Allergies Resources Strategies to Help Manage Allergic AsthmaSearching for Relief From Allergic AsthmaSelf-Care for Nasal Polyps: What to Know Featured Centers Good and Bad Foods for PsoriasisVideo: Getting Personal on Life With MS Health Solutions From Our Sponsors Shot-Free MS Treatment Your Child and COVID-19