Dermatitis simply means “inflammation of the skin.” This is an umbrella term that encompasses many skin conditions, from eczema (atopic dermatitis) to rashes caused by poison ivy (rhus dermatitis). Treatment depends on the underlying condition, but often combines gentle skin care with topical, prescriptions-strength, anti-inflammatory medications.   Atopic dermatitis is another term for eczema. Allergic contact dermatitis occurs when someone develops true sensitization to a chemical, ingredient, even certain plants over time, resulting in a skin eruption.  Click the link to find out more about allergic contact dermatitis. Eyelid dermatitis is a regional eczema or allergic contact dermatitis in the delicate skin around the eyes.  The most common cause of eyelid dermatitis is an irritating substance transferred from the hands or fingernails to the thin skin of the eyelids.  In these cases, nail lacquer, acrylic nails, glue, epoxy hardeners, insect sprays, fragrances, cosmetics, or harsh detergents may be implicated.  The eyelid region appears red, swollen flaky, or crusted.  The skin often burns or itches.  Treatment includes avoidance of provocative agents, low potency topical corticosteroids, topical calcineurin inhibitors, and gentle skin care. Irritant dermatitis is caused when a high concentration of a chemical or substance is exposed to the skin, causing a skin eruption commonly referred to as a rash.  Moist areas of skin and thin-skinned areas such as the eyelid skin are more prone to developing irritant dermatitis.  Fragrances, strong chemicals, acids, alkalis, and certain metals may all cause irritant dermatitis.  Treatment consists of identifying the irritant, removing it from contact with the skin, and the use of topical anti-inflammatory and corticosteroid medication.