Atopic dermatitis is a long-term (chronic) skin disorder. It causes dry, itchy, scaly patches. The patches are often on the face and the head in babies. It's most common in infants or very young children. Most will show signs of the condition in the first year of life. Symptoms may last until the teens or adulthood. It rarely starts in adulthood. It isn't contagious.

Treatment for this condition is aimed at calming the skin inflammation, reducing the itching, and preventing infections. Good skin care and medicine to control itching and infection are used.

This condition is a type of eczema. Eczema is a general term that includes conditions that make the skin red, itchy, and inflamed. Atopic dermatitis is the most common type of eczema. So it's often just called eczema.

Experts don't know what causes this condition. It tends to run in families, which means there may be a genetic link. It's also linked to asthma and allergies. These are immune hypersensitivity disorders. There's likely a change of the proteins in the skin that leads to atopic dermatitis.

Certain triggers can make it worse. For instance, stress, hot or cold temperature, dry conditions, certain fabrics, metals, or detergents can cause a flare-up.

The area of the body affected by atopic dermatitis may change with age. In babies and young children, it often affects the face, outside of the elbows, and the knees. In older children and adults, it tends to be on the hands and feet, the arms, the back of the knees, and the folds of the elbows.

Symptoms can be a bit different for each person. Common symptoms include:

• Itching, which may be mild or very severe.
• Dry, scaly skin patches.
• Small bumps that open and ooze (weep) a clear fluid when scratched.
• Skin redness and swelling.
• Skin thickening (with chronic eczema).
• Scratch marks on the skin.

Too much rubbing and scratching can tear the skin and lead to infection.

Many of these symptoms may be caused by other skin conditions. Always talk with your doctor for a diagnosis.

Your doctor will ask about your health history and if you have allergies or asthma. They will also ask about any family history of dermatitis, allergies, or asthma.

A doctor can often make a diagnosis by examining the skin. You may also have a patch test. This is a test to find allergies. Small amounts of allergens are placed on the skin. Then the skin is watched for a response. A skin biopsy may also be done to rule out other causes of the rash.

Treatment will depend on your symptoms, age, and general health. It will also depend on how bad the condition is.

There is no cure. The goals of treatment are to reduce itching and skin inflammation, to keep the skin moist, and to prevent infection.

Your doctor may also prescribe these medicines in severe cases:

• Antihistamines. These are taken by mouth (oral). They may help ease itching. Some examples include diphenhydramine and hydroxyzine. They may cause drowsiness. Some newer antihistamines don't cause drowsiness.
• Steroid creams. These are put on the skin to help ease inflammation, itching, and swelling. Many topical steroids are available in different strengths. If overused, they can cause skin thinning and discoloration.
• Oral antibiotics. Scratching the affected skin can bring bacteria to the area. It can lead to infection. These medicines kill bacteria that cause infections. If your doctor prescribed antibiotics, take them as directed. Do not stop taking them just because you feel better. You need to take the full course of antibiotics.
• Phototherapy. Two types are used to treat atopic dermatitis: ultraviolet (UV) light therapy and PUVA (chemophototherapy). Light therapy uses UV light of certain wavelengths to target the immune system. It stops the responses that lead to inflammation. PUVA therapy combines medicine and phototherapy. Phototherapy may be used along with other treatment. There are risks and benefits of light therapy. Weigh these with your doctor.
• Topical calcineurin inhibitors . These are nonsteroidal medicines that are put on the skin. They stop a part of the immune response that causes redness and itching.
• Cyclosporine. This medicine has been used for years to treat atopic dermatitis that doesn't respond to other treatments. It was first developed to prevent rejection after organ transplantation. It suppresses the immune system. This stops it from overreacting and helps prevent flare-ups. The medicine has many side effects. It should be considered carefully.
• Methotrexate. This is another immunosuppressive medicine that can be used to manage atopic dermatitis long term. But it may harm the liver.
• Barrier restoration creams. Similar to moisturizers, these creams help repair the skin and provide moisture.
• Topical PDE4 inhibitor. This medicine blocks an enzyme that plays a role in causing inflammation. It is put on the skin, often twice a day.
• Biologic and certain Janus kinase (JAK) inhibitors medicines. Several injectable and oral medicines are now available. These medicines may be expensive and need to be monitored by a doctor. They may work very well.

Complications of atopic dermatitis include:

• Dry skin that is easily irritated.
• Skin infections.
• Eye problems, such as eyelid dermatitis or cataracts.
• Trouble in personal, family, or work relationships.

Experts don't know what causes atopic dermatitis. So there is no known way to prevent it. But staying away from triggers may reduce flare-ups.

These steps can help manage atopic dermatitis:

• Stay away from triggers.
• Take short baths or showers using lukewarm water.
• Practice good skin care.
• Prevent infections.
• Don't use harsh soaps. Ask your doctor to advise a brand.
• Dress in light clothes. Sweating can make atopic dermatitis worse.
• Wash new clothes before wearing them.
• Use a good moisturizer at least once a day. Ask your doctor to advise a brand.
• Don't scratch the affected area. Keep fingernails short and smooth.
• Reduce stress.
• Make lifestyle changes that prevent flare-ups.
• Don't use skin products that have fragrances and dyes.

Tell your doctor if:

• Your symptoms get worse.
• You have new symptoms.

• Atopic dermatitis is a chronic skin disorder. It is often called eczema.
• It tends to run in families. It is most common in infants or very young children.
• It causes itching and dry, scaly, red skin. It has red bumps that open and ooze (weep) clear fluid when scratched.
• It's important to find and stay away from the things that make it worse. Triggers include stress, high or low temperatures, bacterial infections, fabrics, such as wool, metals, and detergents.
• There is no cure. The goals of treatment are to reduce itching and skin inflammation, keep the skin moisturized, and prevent infection.

Tips to help you get the most from a visit to your doctor:

• Know the reason for your visit and what you want to happen.
• Before your visit, write down questions you want answered.
• Bring someone with you to help you ask questions and remember what your doctor tells you.
• At the visit, write down the name of a new diagnosis, and any new medicines, treatments, or tests. Also write down any new instructions your doctor gives you.
• Know why a new medicine or treatment is prescribed, and how it will help you. Also know what the side effects are.
• Ask if your condition can be treated in other ways.
• Know why a test or procedure is recommended and what the results could mean.
• Know what to expect if you do not take the medicine or have the test or procedure.
• If you have a follow-up appointment, write down the date, time, and purpose of that visit.
• Know how you can contact your doctor if you have questions, especially after office hours or on weekends.