This document defines and describes various types of dermatitis (inflammation of the skin). It introduces dermatitis/eczema as characterized by itchiness, redness, and rashes. The main types discussed are atopic dermatitis (eczema), allergic contact dermatitis, irritant contact dermatitis, and stasis dermatitis. Each type is further defined, such as atopic dermatitis resulting in itchy, red, swollen and cracked skin. Causes, symptoms and ICD-10 codes are provided for several dermatitis types.