DEAR MAYO CLINIC: My 2-year-old son has a new rash on his arms and back. His doctor said it looks like eczema. He is itching nonstop and that creates red, raw skin. It seems to be worse while he’s lying in bed. No one in the house is getting good sleep because he’s so uncomfortable. What can I do to help him feel better and get some rest?

ANSWER: Itchy and uncomfortable skin is bothersome for adults, but it can be especially difficult for young children. As you have discovered, it can interrupt sleep for the entire family and be a distraction during the day, or cause pain and embarrassment.

Eczema, also called atopic dermatitis, is a common, itchy skin condition in childhood. Most cases begin before age 5, but eczema can occur at any age. It is long-lasting and can appear anywhere on the body.

When a child has eczema, the skin becomes dry and cracked. It can be especially itchy and look like small, raised bumps on the skin. Sometimes, the skin can thicken or darken. It can even become painful when the skin gets raw from intense scratching. Importantly for family and friends, eczema is not contagious.

At its core, eczema is a barrier problem of the skin. Under normal circumstances, the skin acts as a barrier for things moving in and out of the body. When a person has eczema, the barrier is not working as effectively. This allows environmental contaminants to penetrate the skin and protective moisture to leave.

Many things can trigger eczema. Common culprits are fragrances and dyes in products, like laundry detergents, soaps and lotions. Keeping a journal of potential triggers and the child’s skin reaction can be helpful. This doesn’t need to be elaborate, but having a way of documenting symptoms can help to identify eczema triggers for your child.

People with eczema may have other conditions in the “atopic triad,” namely asthma and allergic rhinitis, also called seasonal allergies. Some children have one or two of these conditions, while their siblings have other ones. Researchers are still trying to understand the link between these conditions, but there clearly is a genetic component. Watch for symptoms of asthma and allergic rhinitis as your son grows.

Treating eczema

The best way to treat eczema is to avoid triggers that cause a flare. I recommend that your entire family switches to fragrance-free, dye-free products. Children like to hug and snuggle with parents and siblings, so their clothing and bedding should be fragrance- and dye-free as well to prevent eczema flares.

Medical treatment of eczema begins by controlling skin inflammation. If we can treat skin inflammation, we can control the itch. In the past, eczema often was treated with antihistamines, partly because of the sleepiness they could induce. These medications are used less now because the itch in atopic dermatitis does not appear to be histamine-based.

Usually, the first line of medical treatment is topical steroids. They are effective and time-tested. I often recommend treating eczema using a method called "wet wraps" consistently for two weeks. This is cumbersome but very effective, and it remains a tool for use in the future for subsequent flares. Taking photos before and after treatment is reassuring because improvement in the skin may be subtle at first.

There are lifestyle changes that your family can do at home to reduce eczema flares, such as:

Most kids will outgrow the constant need to have topical steroids, but the condition is genetically determined, so your son will need to maintain diligence as he gets older. Avoiding products with perfumes and dyes will be a lifelong commitment. — Kevin Boyd, M.D., Dermatology, Mayo Clinic Health System in Onalaska, Wisconsin

(Mayo Clinic Q & A is an educational resource and doesn’t replace regular medical care. This Mayo Clinic Q&A represents inquiries this healthcare expert has received from patients. For more information, visit www.mayoclinic.org.)

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