is atopic dermatitis the same as eczema
Understanding your atopic dermatitis. Atopic dermatitis (also known as AD) is the most common type of eczema. In fact, 17.8 million Americans have AD â which often appears as a red, itchy rash normally on the cheeks, arms and legs. Atopic dermatitis exists with two other allergic conditions: asthma and hay fever (allergic rhinitis).