Eczema refers to a group of conditions characterized by dry, inflamed, and itchy skin. The most common kind of eczema is atopic dermatitis. Other forms of eczema include contact dermatitis, irritant dermatitis, nummular dermatitis, and dyshidrotic eczema. The term eczema is often used by people to refer to any of these conditions. Treatment depends on the type of eczema but includes topical moisturizers, topical steroids, and systemic medications if needed.