Food Allergies, Sensitivities, and Eczema: What’s the Connection?
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The Food-Eczema Connection: What You Need to Know About Diet and Atopic Dermatitis

The Food-Eczema Connection: What You Need to Know About Diet and Atopic Dermatitis
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Updated on April 20, 2026
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Peanuts, eggs, and milk can trigger allergic reactions. But for some people with atopic dermatitis (AD), the most common form of eczema, these foods can also trigger a flare of itchy, red skin. That’s because food allergies and their milder cousin, food sensitivities (also called intolerances), can go hand in hand with AD.

Some evidence suggests up to 80 percent of people with early-onset, persistent, or severe AD also have food allergies, though 20 to 30 percent of people with AD, particularly those with mild illness, don’t have them at all. Some children will outgrow their allergies, while others will continue to experience them into adulthood. It can also depend on the allergen; 90 to 95 percent of children outgrow milk and egg allergies, but allergies to nuts (including peanuts, which are technically legumes), seeds, and shellfish are often lifelong.

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The Link Between Food Allergies, Food Sensitivities, and AD

The skin barrier becomes impaired in people who have AD. Once this happens, sensitivity increases not only to environmental allergens but also to food allergens, says Schweta Arakali, MD, an allergist at the Center for Allergy and Asthma Care in Allentown, Pennsylvania.

Even if you don’t have a food allergy — which causes reactions that can include hives or anaphylactic shock, among other possible symptoms — you can still have a food sensitivity.

“If you’re sensitive to a food, you may have worsening existing eczema patches, or you may notice your skin feels itchier overall,” says Marisa Garshick, MD, a clinical assistant professor of dermatology at Weill Cornell Medical College and a dermatologist at MDCS Dermatology in New York City. You may also develop a rash or have an upset stomach or diarrhea after you eat certain foods, she says.

It can be challenging to pinpoint a food sensitivity. Unlike a true allergy, which tends to cause a reaction right away but can take up to two hours, a food sensitivity reaction may take up to three days before you notice any symptoms.

“Some people might get [food sensitivity] symptoms within minutes to hours,” says Danilo C. Del Campo, MD, a dermatologist at Chicago Skin Clinic. “For other people, it might be a couple days after.” Once a food sensitivity reaction occurs, it could persist for days or even weeks, he says.

How to Know if a Food Is Triggering Your AD Flares

Although food allergies and sensitivities vary from one person to the next, some foods tend to cause symptoms for people with AD. Some of the most common culprits include:

  • Peanuts
  • Tree nuts
  • Eggs
  • Milk and dairy products
  • Fish
  • Shellfish
  • Soy products
  • Wheat
If you have a known food allergy, stop eating that food. Food allergies can become life-threatening, even if your past reactions were mild.

If you think you might have a food sensitivity and aren’t sure which food is triggering your symptoms, you may be tempted to try an elimination diet. This is a process in which you stop eating one or more possible food culprits for several weeks before slowly reintroducing them into your diet and recording how you feel.

But experts usually don’t recommend people with AD start a food elimination diet — at least not without the help of an allergist.

“Prolonged or strict food avoidance may lead to more severe reactions in the future with ingestion,” says Dr. Arakali. That can mean more severe eczema as well as an increased risk of developing a true food allergy.

Plus, there may be many more causes of an AD flare-up besides food, says Arakali, including dust mites, dander, contact allergens, and nonallergic triggers, such as stress or infection.

Even if you’re allergic or sensitive to certain foods, cutting them out of your diet is only part of treating your AD. “It’s important to know that a true elimination diet in and of itself may not be enough to [treat] eczema,” says Dr. Garshick.

What to Do if You Think You Have a Food Allergy or Sensitivity

If you suspect something in your diet may be setting off AD symptoms and flares, see your dermatologist. They will likely want to try traditional eczema treatments before testing for food allergies, says Garshick.

Once you’re doing all you can to manage your AD with medical treatments, you can try adjusting your diet with the help of your doctor.

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Resources
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  4. Rock K. Can My Child Outgrow a Food Allergy? What Parents Need to Know Today. University of Rochester Medical Center. December 19, 2025.
  5. Dębińska A et al. Epicutaneous Sensitization and Food Allergy: Preventive Strategies Targeting Skin Barrier Repair — Facts and Challenges. Nutrients. February 21, 2023.
  6. Louwagie V. Food Intolerance or Food Allergy? Mayo Clinic. May 12, 2022.
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  8. Food Allergy vs. Intolerance: What’s the Difference? Cleveland Clinic. April 13, 2022.
  9. Diet & Nutrition for Eczema. National Eczema Association. May 6, 2025.
  10. Why and How To Start an Elimination Diet. Cleveland Clinic. April 12, 2022.
  11. Moncayo-Hida J. A Look at the Food Elimination Diet Trend for Atopic Dermatitis. National Eczema Association. December 5, 2023.
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Blair Murphy-Rose, MD, is a board-certified dermatologist in New York City and the founder of Skincare Junkie. She is an accomplished cosmetic, medical, and surgical dermatologist,...

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