Dermatitis is a general term that describes an inflammation of the skin.
Although dermatitis can have many causes and occurs in many forms, this
disorder usually involves an itchy rash on swollen, reddened skin.
Skin affected by dermatitis may blister, ooze, develop a crust or flake off. Examples of dermatitis include atopic dermatitis (eczema), dandruff, and rashes caused by contact with poison ivy or certain metals.