This issue of Dermatologic Clinics examines Contact Dermatitis. Guest Editor Susan Nedorost has assembled a panel of world-class experts who offer reviews on topics, including Patient education to enhance contact dermatitis evaluation and testing, Recognizing and testing new allergens, Determining relevance of patch tests and avoidance strategies, Hand/face/neck localized pattern: sticky problems-resins, Hand dermatitis: a focus on allergic contact dermatitis to biocides, Run-off pattern or perioral facial dermatitis due to hair and lip products, Clinical patterns of hand and foot dermatitis: emphasis on rubber and chromate allergens, Unusual patterns: medicaments, Clinical patterns of phytodermatitis, Factors associated with textile pattern dermatitis due to contact allergy to dyes, finishes, foams and preservatives, Acute and recurrent vesicular hand dermatitis, Systemic contact dermatitis, Management of occupational dermatitis, and Public health challenges in contact dermatitis.