Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) atopic dermatitis ?
    ### Response:
    Atopic dermatitis (also known as atopic eczema) is a disorder characterized by inflammation of the skin (dermatitis). The condition usually begins in early infancy, and it often disappears before adolescence. However, in some affected individuals the condition continues into adulthood or does not begin until adulthood.
    