Does food cause eczema?
No. Eczema develops from a combination of genetics, a weakened skin barrier and an over-reactive immune system.⁴ Some children with eczema also have a food allergy, but the two are separate conditions, and most children with eczema don't need to avoid any foods.
A red rash after a meal doesn't automatically mean a food allergy either. Food can affect the skin in two quite different ways, explained below.
Why are babies with eczema more likely to develop food allergies?
Eczema affects about one in five Australian babies under two.¹ When the skin barrier isn't working well, food proteins can come into contact with the body through the skin, and babies with eczema may develop a food allergy after this kind of skin exposure.¹
That's why the National Allergy Council's Nip allergies in the Bub program focuses on two things: introducing common allergy foods early, and managing eczema well, as good eczema care may help reduce the risk of food allergy developing.¹ For daily skin care tips, read our guide on how to care for eczema-prone skin.
Contact irritation or food allergy: how to tell the difference
| Contact irritation | Food allergy | |
|---|---|---|
| Where | Where food touched the skin: around the mouth, cheeks, hands | Can appear anywhere, including hives on the body |
| Other signs | Usually none | May include swelling of the lips, face or eyes, vomiting, or breathing difficulty |
| Common culprits | Acidic or juicy foods, such as tomato, citrus and berries | Commonly egg, peanut, cow's milk, tree nuts, sesame, fish, shellfish, wheat or soy |
| What to do | Wipe gently with water, then moisturise | Stop the food and see your doctor. Call 000 for any breathing difficulty, swelling of the tongue or throat, or floppiness |
Contact irritation is common in babies learning to eat, especially with messy, acidic foods. The redness usually stays where the food touched, settles on its own, and doesn't mean your baby is allergic to that food.
Food allergy is an immune reaction to eating a food. It usually happens soon after eating, and can affect more than the skin. Food allergies should always be confirmed by a doctor.³
How to protect your baby's skin at mealtimes
- After meals: gently wipe your baby's face and hands with a soft cloth and water, rather than rubbing, then reapply moisturiser.
- Watch the pattern: note when redness appears and where. Redness that stays around the mouth and fades quickly is more likely to be irritation than allergy.
Introducing allergy foods to a baby with eczema
ASCIA's advice applies to all babies, including those with eczema:²
- Start solids at around six months, when your baby is ready, but not before four months.
- Include common allergy foods by 12 months, in an age-appropriate form, such as well-cooked egg and smooth peanut butter or paste.
- Keep them in the diet: offer egg and peanut regularly, about twice a week, once introduced.
- One at a time: introduce only one new common allergy food at each meal, so it's easier to identify the cause if a reaction occurs.³
Early introduction matters most for babies at higher risk. Introducing peanut before 12 months to babies with severe eczema or egg allergy can reduce their risk of developing peanut allergy by around 80%.⁵ If your baby has severe eczema or an existing food allergy, talk to your GP about how to introduce allergy foods.⁶
For recipes and practical tips, visit the National Allergy Council's Nip allergies in the Bub website.
Should you remove foods from your child's diet?
Not without medical advice. Delaying the introduction of common allergy foods doesn't prevent food allergy.³ Removing foods unnecessarily can also make it harder to meet your child's nutritional needs.
If you think a food is affecting your child, see your GP. They may refer you to a clinical immunology/allergy specialist, who can confirm or rule out a food allergy with tests interpreted alongside your child's history. If an allergy is confirmed, your doctor will give you an ASCIA Action Plan, and a dietitian can help keep your child's diet balanced.
When should you see a doctor?
See your GP if:
- you think your child reacts to a particular food,
- your baby has severe eczema and you're about to start solids,
- your child's eczema isn't improving despite regular moisturising and prescribed treatment.
Call 000 immediately if your child has difficulty breathing, swelling of the tongue or throat, a persistent cough, or becomes pale and floppy after eating.
Frequently asked questions about eczema and food
Should I change my diet while breastfeeding?
No. ASCIA doesn't recommend avoiding allergy foods during pregnancy or breastfeeding to prevent allergies in your baby.⁶ Talk to your doctor if your baby has a confirmed food allergy.
Can food make eczema worse?
For most children, food isn't a trigger for eczema flares. In children with a confirmed food allergy, eating that food can cause an allergic reaction, which may include a flare. Your doctor can help work out whether food plays a role for your child.
Is redness around the mouth after eating a food allergy?
Not usually. Redness that appears only where food touched the skin, and fades on its own, is often contact irritation from acidic or messy foods. Gently clean and moisturise the skin, and see your GP if you notice other symptoms.
References
- National Allergy Council. World-first national health campaign to help parents prevent food allergies (Nip allergies in the Bub).
- ASCIA. How to Introduce Solid Foods for Allergy Prevention – FAQ (2024).
- KidsHealth NZ. Nip allergies in the Bub: common allergy causing foods.
- ASCIA. Eczema (Atopic Dermatitis) – Fast Facts.
- ASCIA. Guide for introduction of peanut to infants with severe eczema and/or food allergy.
- ASCIA. Guidelines: Infant Feeding and Allergy Prevention (2020).
This article provides general information and does not replace medical advice. Always consult your GP, paediatrician or allergy specialist about your child's diet and skin.
