Dermatitis is a term for several different types of skin swelling. Dermatitis is also called eczema. It is not dangerous, but most types cause red, swollen and itchy skin. Factors that can cause dermatitis include other diseases, irritating substances, allergies and your genetic makeup. The most common type of dermatitis is atopic dermatitis. It is an allergic condition that makes your skin dry and itchy. It is most common in babies and children.
Click here for more information. http://www.nlm.nih.gov/medlineplus/eczema.html