The cause of atopic dermatitis isn't clear, but it affects your skin's ability to hold moisture. Your skin becomes dry, itchy, and easily irritated.
Most people who have atopic dermatitis have a personal or family history of allergies, such as hay fever (allergic rhinitis) or asthma.
Atopic dermatitis starts with dry skin that is often very itchy. Scratching causes the dry skin to become red and irritated (inflamed). Infection often occurs. Tiny bumps that look like little blisters may appear and ooze fluid or crust over. These symptoms—dryness, itchiness, scratching, and inflammation—may come and go. Over time, a recurring rash can lead to tough and thickened skin.
Mild atopic dermatitis affects a small area of skin and may be itchy once in a while. Moderate and severe atopic dermatitis cover larger areas of skin and are itchy more often. And at times the itch may be intense.
People tend to get the rash on certain parts of the body, depending on their age. Common sites for babies include the scalp and face (especially on the cheeks), the front of the knees, and the back of the elbows. In children, common areas include the neck, wrists, legs, ankles, the creases of elbows or knees, and between the buttocks. In adults, the rash often appears in the creases of the elbows or knees and on the nape of the neck.
A doctor can usually tell if you have atopic dermatitis by doing a physical exam and asking questions about your past health.
Your doctor may advise allergy testing to find the things that trigger the rash. Allergy tests can be done by an allergist (immunologist) or dermatologist.
Atopic dermatitis is usually treated with medicines that are put on your skin (topical medicines). Gentle skin care, including using plenty of moisturizer, is also important.
Getting medical treatment early may keep your symptoms from getting worse.
If the topical medicines don't help, your doctor may prescribe other treatments, such as pills, phototherapy, or injections.
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The cause of atopic dermatitis isn't known. But most people who have it have a personal or family history of allergies, such as hay fever (allergic rhinitis). The skin inflammation that causes the atopic dermatitis rash is considered a type of allergic response.
Itching and rash can be triggered by many things, including:
The main symptom of atopic dermatitis is itching. The itching can be severe and persistent, especially at night. Scratching the affected area of skin usually causes a rash. The rash is red and patchy and may be long-lasting (chronic) or come and go (recurring). The rash may:
How bad your symptoms are depends on how large an area of skin is affected, how much you scratch the rash, and whether the rash gets infected.
The areas most often affected are the face, scalp, neck, arms, and legs. The rash is also common in areas that bend, such as the back of the knees and inside of the elbows. Rashes in the groin or diaper area are rare. There may be age-related differences in the way the rash looks and behaves.
For adolescents and adults, atopic dermatitis often improves as you get older.
Atopic dermatitis is most common in babies and children. Most children outgrow it. But some teens and adults continue to have problems with it, though it's usually not as bad as when they were children.
The condition may affect how children feel about themselves. If others can see the rash, a child may feel self-conscious and may need to be reassured.
Atopic dermatitis can cause problems with sleep. The itching caused by atopic dermatitis, especially during flares, can make it hard for children to fall asleep or to get good sleep.
Skin infections can happen more often in people with atopic dermatitis. The skin may become red and warm, and a fever may develop. Skin infections are treated with antibiotics.
One type of skin infection is eczema herpeticum. It happens when atopic dermatitis is infected with the herpes simplex virus. The rash will likely blister and may begin to bleed and crust. You may also have a high fever. This is a serious infection, so contact your doctor right away.
The major risk factor for atopic dermatitis is having a family history of the condition. You are also at risk if family members have asthma, allergic rhinitis, or other allergies.
Call your doctor if you or your child has atopic dermatitis and:
Most cases of atopic dermatitis can be diagnosed from a medical history and a physical exam.
Your doctor may recommend allergy testing to find out what might be causing your atopic dermatitis. Allergy testing is most helpful for people with atopic dermatitis who also have respiratory allergies or asthma.
Testing can also help find out if certain foods, such as eggs or nuts, are making the condition worse. Talk with your doctor about testing for allergies before making dietary changes.
If a specific allergen is thought to trigger your atopic dermatitis, you and your doctor will discuss how to remove it from your diet or environment while closely observing and recording your symptoms.
Treatment for atopic dermatitis depends on the type of rash you have. Most mild cases can be treated at home with moisturizers—especially skin barrier repair moisturizers—and gentle skin care. Most of the time, rash and itching can be controlled within 3 weeks.
Your doctor may talk to you about bleach baths and wet wraps. He or she will give you directions on how to use these treatments.
Getting medical treatment early may keep your symptoms from getting worse.
For rashes that don't get better with medicines or moisturizers, treatment may include:
For itching, treatment may include antihistamines. Also, taking baths with colloidal oatmeal (such as Aveeno) or applying wet dressings to the rash for 30 minutes several times a day may help.
In severe cases, hospitalization may be needed. A short stay in the hospital can quickly control the condition.
Counseling may be helpful for children and adults with atopic dermatitis. Talking with a counselor can help reduce stress and anxiety caused by atopic dermatitis and can help a person cope with the condition.
If your baby is at risk for atopic dermatitis because you or other family members have it or other allergies, these steps may help prevent a rash or reduce its severity:
It may be possible to prevent peanut allergies by giving peanut protein to your baby when he or she starts solid foods. Ask your baby's doctor about when and how to include peanut protein in your baby's diet. If your baby has atopic dermatitis, you may help prevent peanut allergies by introducing peanut products early.
Home treatment for atopic dermatitis includes taking care of your skin and avoiding things that irritate it.
Medicines for atopic dermatitis are used to help control itching and heal the rash. If you or your child has a very mild itch and rash, you may be able to control it without medicine by using home treatment and preventive measures. But if symptoms are getting worse despite home treatment, you will need to use medical treatment to prevent the itch-scratch-rash cycle from getting out of control.
Topical medicines, such as creams or ointments, are applied directly to the skin.
Both corticosteroids and calcineurin inhibitors are strong medicines, so be sure to follow carefully your doctor's directions. They shouldn't be used for long periods of time, so use them only as long as your doctor says. And any skin that has these medicines on it shouldn't be covered with any material that keeps air from getting to your skin, unless your doctor tells you to.
Other medicines include:
Other treatment for atopic dermatitis includes light therapy and complementary medicine.
Severe atopic dermatitis may be treated by exposing affected skin to ultraviolet (UV) light. There are two types of ultraviolet light, called ultraviolet A (UVA) and ultraviolet B (UVB). Phototherapy uses UVA, UVB, or a combination of UVA and UVB.
Too much sun exposure and light treatment (such as with UVA or UVB treatments) increases your risk of skin cancer.
Talk with your doctor about any complementary health practice that you would like to try or are already using. Your doctor can help you manage your health better if he or she knows about all of your health practices.
- Togias A, et al. (2017). Addendum guidelines for the prevention of peanut allergy in the United States: Report of the National Institute of Allergy and Infectious Diseases-sponsored expert panel. Journal of Allergy and Clinical Immunology, 139(1): 29-44. DOI: 10.1016/j.jaci.2016.10.010. Accessed August 23, 2017.
Other Works Consulted
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- Bieber T (2008). Mechanisms of disease: Atopic dermatitis. New England Journal of Medicine, 358(14): 1483–1494.
- Greer FR, et al. (2008). Effects of early nutritional interventions on the development of atopic disease in infants and children: The role of maternal dietary restriction, breastfeeding, timing of introduction of complementary foods, and hydrolyzed formulas. Pediatrics, 121(1): 183–191. Also available online: http://pediatrics.aappublications.org/content/121/1/183.full.
- Habif TP (2010). Atopic dermatitis. In Clinical Dermatology, A Color Guide to Diagnosis and Therapy, 5th ed., pp. 154–180. Edinburgh: Mosby Elsevier.
- Habif TP, et al. (2011). Atopic dermatitis. In Skin Disease: Diagnosis and Treatment, 3rd ed., pp. 71–76. Edinburgh: Saunders.
- Krakowski AC, et al. (2008). Management of atopic dermatitis in the pediatric population. Pediatrics, 122(4): 812–824.
- Schmitt J, et al. (2011). Eczema, search date May 2009. Online version of BMJ Clinical Evidence: http://www.clinicalevidence.com.
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