Eczema, contact: A localized reaction that involves redness, itching, and burning that occurs where the skin has come into contact with an allergen (an allergy-causing substance) or an irritant such as an acid, a cleaning agent, or another chemical. QUESTION Eczema (also atopic eczema or atopic dermatitis) is a general medical term for many types of skin inflammation. See Answer From Skin Problems and Treatments Resources Tips for Dry SkinSensitive Skin? How to keep skin healthy.Stop the Scratching 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