Atopic dermatitis is a chronic (long-lasting) disease that affects
    the skin. It is not contagious; it cannot be passed from one person to another.
    The word “dermatitis” means inflammation of the skin. “Atopic” refers to a group
    of diseases where there is often an inherited tendency to develop other allergic
    conditions, such as asthma and hay fever. In atopic dermatitis, the skin becomes
    extremely itchy. Scratching leads to redness, swelling, cracking, “weeping”
    clear fluid, and finally, crusting and scaling. In most cases, there are periods
    of time when the disease is worse (called exacerbations or flares) followed by
    periods when the skin improves or clears up entirely (called remissions). As
    some children with atopic dermatitis grow older, their skin disease improves or
    disappears altogether, although their skin often remains dry and easily
    irritated. In others, atopic dermatitis continues to be a significant problem in

    Atopic dermatitis is often referred to as “eczema,” which is a
    general term for the several types of inflammation of the skin. Atopic
    dermatitis is the most common of the many types of eczema. Several have very
    similar symptoms. Types of eczema are described in the box on page 5.

    Incidence and Prevalence of Atopic Dermatitis

    Atopic dermatitis is very common. It affects males and females and
    accounts for 10 to 20 percent of all visits to dermatologists (doctors who
    specialize in the care and treatment of skin diseases). Although atopic
    dermatitis may occur at any age, it most often begins in infancy and childhood.
    Scientists estimate that 65 percent of patients develop symptoms in the first
    year of life, and 90 percent develop symptoms before the age of 5. Onset after
    age 30 is less common and is often due to exposure of the skin to harsh or wet
    conditions. Atopic dermatitis is a common cause of workplace disability. People
    who live in cities and in dry climates appear more likely to develop this

    Although it is difficult to identify exactly how many people are
    affected by atopic dermatitis, an estimated 20 percent of infants and young
    children experience symptoms of the disease. Roughly 60 percent of these infants
    continue to have one or more symptoms of atopic dermatitis in adulthood. This
    means that more than 15 million people in the United States have symptoms of the

    Types of Eczema (Dermatitis)

    • Allergic contact eczema (dermatitis): a red, itchy, weepy reaction
      where the skin has come into contact with a substance that the immune system
      recognizes as foreign, such as poison ivy or certain preservatives in creams and

    • Atopic dermatitis: a chronic skin disease characterized by itchy,
      inflamed skin

    • Contact eczema: a localized reaction that includes redness,
      itching, and burning where the skin has come into contact with an allergen (an
      allergy-causing substance) or with an irritant such as an acid, a cleaning
      agent, or other chemical

    • Dyshidrotic eczema: irritation of the skin on the palms of hands
      and soles of the feet characterized by clear, deep blisters that itch and burn

    • Neurodermatitis: scaly patches of the skin on the head, lower
      legs, wrists, or forearms caused by a localized itch (such as an insect bite)
      that become intensely irritated when scratched

    • Nummular eczema: coin-shaped patches of irritated skin-most common
      on the arms, back, buttocks, and lower legs-that may be crusted, scaling, and
      extremely itchy

    • Seborrheic eczema: yellowish, oily, scaly patches of skin on the
      scalp, face, and occasionally other parts of the body

    • Stasis dermatitis: a skin irritation on the lower legs, generally
      related to circulatory problems

    Cost of Atopic Dermatitis

    In a recent analysis of the health insurance records of 5 million
    Americans under age 65, medical researchers found that approximately 2.5 percent
    had atopic dermatitis. Annual insurance payments for medical care of atopic
    dermatitis ranged from $580 to $1,250 per patient. More than one-quarter of each
    patient’s total health care costs were for atopic dermatitis and related
    conditions. The researchers project that U.S. health insurance companies spend
    more than $1 billion per year on atopic dermatitis.

    Causes of Atopic Dermatitis

    The cause of atopic dermatitis is not known, but the disease seems
    to result from a combination of genetic (hereditary) and environmental

    Children are more likely to develop this disorder if one or both
    parents have had it or have had allergic conditions like asthma or hay fever.
    While some people outgrow skin symptoms, approximately three-fourths of children
    with atopic dermatitis go on to develop hay fever or asthma. Environmental
    factors can bring on symptoms of atopic dermatitis at any time in individuals
    who have inherited the atopic disease trait.

    Atopic dermatitis is also associated with malfunction of the
    body’s immune system: the system that rec


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