Complete Beginner’s Guide to Eczema Triggers in Babies and Children (2026)

Eczema triggers fall into several overlapping categories. Most children have triggers from more than one category, and triggers can change as children grow. This is one reason why a trigger diary (noted below) is more useful than a generic trigger list.

1. Fabric and clothing

This is one of the most consistently impactful trigger categories, particularly for babies and young children who are in clothing around the clock. Fabric that sits directly against the skin affects it continuously in ways that occasional environmental exposures do not.

The key mechanisms are friction, heat, moisture trapping, and chemical residue. Rough or scratchy fibres cause micro-abrasion on already compromised skin. Synthetic fabrics trap heat and sweat against the skin, creating a warm, moist environment that worsens eczema. Some fabric dyes and finishing chemicals can act as contact irritants.

Fabrics most commonly associated with eczema reactions include synthetic polyester, nylon, and acrylic; rough wool; and heavily dyed or chemically treated fabrics. Fabrics generally better tolerated include natural fibres like cotton and bamboo, which are softer, breathable, and less likely to trap heat.

The difference bamboo fabric specifically makes for eczema-prone skin — including the thermoregulation, moisture-wicking, and antibacterial properties — is covered in depth in the article on the science behind bamboo fabric for eczema-prone skin.

Practical steps:

• Choose loose-fitting, soft natural fibres for everyday wear and especially for sleepwear
• Wash all new clothing before first wear to remove finishing chemicals
• Avoid rough seams, tight elastic waistbands, and scratchy labels against skin
• At night, when scratching risk is highest, consider eczema-specific sleepwear designed to reduce friction and prevent unconscious scratching

2. Heat and sweat

Overheating is one of the most reliable eczema triggers, and one of the most underestimated. When body temperature rises, sweat is produced — and sweat is a direct irritant to eczema-prone skin. It disrupts the surface pH, activates itch receptors, and creates the moist environment that bacteria thrive in.

In Australian conditions, this is a year-round issue. Summer heat is an obvious challenge, but indoor central heating in winter, overbundling a baby, and exercise can all cause overheating regardless of season.

Practical steps:

• Keep bedroom temperature around 18°C for sleeping, which reduces overnight sweating and itching
• Dress in layers that can be removed rather than one warm layer that can’t
• Choose breathable bedding — bamboo sheets and cotton are both significantly better than synthetic options at managing night-time temperature
• After exercise or active play, rinse skin promptly with lukewarm water to remove sweat before it sits on the skin

3. Laundry products and detergent residue

Laundry detergent residue left in clothing and bedding is a frequently overlooked trigger — because it’s invisible. Fragranced detergents, fabric softeners, and biological detergents (which contain enzymes) are all common irritants for eczema-prone skin.

The issue is not always which detergent you use but how much you use and whether the rinse cycle removes it fully. Residue that stays in fabric continues to contact and irritate skin every time the item is worn.

Practical steps:

• Use fragrance-free, dye-free detergents formulated for sensitive skin
• Avoid fabric softeners entirely — they leave a coating on fibres that can irritate eczema skin
• Use the minimum recommended detergent dose — more is not better and increases residue risk
• Run an extra rinse cycle where possible, particularly for sleepwear and items worn directly against skin

4. Skincare and personal care products

Bath products, shampoos, wipes, sunscreens, and moisturisers that contain fragrance, alcohol, preservatives, or certain emulsifiers can all trigger reactions in eczema-prone skin. Even products marketed as “natural” or “dust mites, or use a hot dryer cycle if washing at lower temperatures

• Reduce soft toys in the bedroom, or wash them regularly at high temperature
• Keep pets out of bedrooms where possible if pet dander is a suspected trigger
• Vacuum with a HEPA filter vacuum cleaner and damp-dust surfaces to reduce allergen accumulation

7. Skin infections

Children with eczema are significantly more prone to skin infections than other children, because the compromised skin barrier allows bacteria, viruses, and fungi to penetrate more easily. The most common is Staphylococcus aureus (staph), which colonises the skin of most children with eczema. When staph levels are high, they trigger an immune response that worsens inflammation and itching, which leads to more scratching, more barrier damage, and more infection — a cycle that is difficult to break without treatment.

Signs that a flare may be infected include: weeping or oozing skin, yellow crusting, increased redness and warmth, swelling, or fever. Infected eczema requires medical treatment — speak to your GP or dermatologist promptly.

Preventing infection involves keeping fingernails short, discouraging scratching as much as possible, maintaining consistent moisturisation, and changing and washing sleepwear regularly.baby-safe” may contain botanical fragrances or essential oils that are significant irritants.

Practical steps:

• Choose fragrance-free products with minimal ingredient lists
• Apply moisturiser to damp skin immediately after bathing — this is one of the most evidence-backed strategies for maintaining skin barrier function
• Use lukewarm (not hot) bath water — hot water strips natural oils from already-compromised skin
• Limit bath time to 10 to 15 minutes and pat skin dry gently rather than rubbing
• Introduce new skincare products one at a time so reactions can be attributed clearly

5. Food triggers and eczema

Food triggers are real but often overstated as a cause of eczema flares. Research suggests that eczema triggers from food are a significant factor in a subset of children with moderate-to-severe eczema — estimated at around 30 to 40% — but the majority of eczema flares are driven by environmental and skin care factors rather than diet.

The most commonly implicated foods in children with eczema-related food allergy include cow’s milk, egg, peanut, tree nuts, wheat, soy, and seafood. It is important to note that these foods do not cause eczema — rather, in children who have both eczema and food allergy, ingestion can trigger a flare.

Do not eliminate foods from your child’s diet without professional guidance. Food elimination in young children can create nutritional gaps and, paradoxically, increase the risk of developing a more severe food allergy. If you suspect food is a trigger, discuss this with your GP or a paediatric allergist before making dietary changes.

The timing of introducing allergenic foods also matters. Current Australian (ASCIA) guidelines recommend introducing common allergens including egg and peanut from around four to six months of age in infants with eczema, under medical guidance — earlier introduction is now understood to reduce, not increase, allergy risk in many cases.

6. Environmental allergens

Dust mites, pet dander, mould, and pollen are all environmental allergens that can trigger eczema flares in sensitised children. These allergens can both contact the skin directly and be inhaled — both pathways can worsen eczema.

Dust mites are particularly relevant. They thrive in warm, humid bedding and soft furnishings and are one of the most common environmental eczema triggers in Australia. Their droppings contain proteins that are potent allergens for atopic skin.

Practical steps:

• Use dust-mite-resistant mattress and pillow protectors
• Wash bedding weekly at 60°C to kill 

8. Stress and emotional activation

Stress is a documented eczema trigger in children, operating through the immune-nervous system connection. Stress hormones including cortisol affect immune function and skin barrier repair processes. In babies and toddlers, this may present as flares during developmental transitions, illness, or changes in routine. In older children, school pressure, social stress, or family disruption may precede a flare.

The itch-scratch cycle also has a strong emotional feedback loop — itching causes distress, distress worsens itching, and broken sleep amplifies both. Addressing the emotional dimension of eczema, including ensuring adequate sleep and calm routines, is a genuine part of management.

Not every child responds to the same triggers, and triggers can change as children grow. The most effective approach is systematic observation, not a one-size-fits-all elimination strategy.

A trigger diary is the most practical tool. For two to four weeks, note:

• What your child wore (fabric type, newly washed or not)
• What they ate in the 24 to 48 hours before a flare
• Environmental conditions (temperature, humidity, whether they were overheated)
• Any new products used on skin or in laundry
• Stress events or illness
• Severity of flare (location, intensity, timing)

Patterns usually emerge within a few weeks. Once you suspect a trigger, removing it for two to four weeks and observing the effect is the practical test. If you suspect food, do this under medical guidance only.

For families in Australia, ASCIA (the Australasian Society of Clinical Immunology and Allergy) and the Royal Children’s Hospital Melbourne both provide evidence-based eczema management resources that are worth bookmarking.

• Eliminating foods without medical guidance: Dietary restriction in young children without a confirmed allergy diagnosis is rarely helpful, can harm nutrition, and can increase allergy risk. Always test food triggers with professional support.
• Focusing only on what the child eats while ignoring what they wear: In many families, fabric and laundry triggers are more consistently impactful than food, yet receive far less attention.
• Using ‘natural’ or ‘organic’ products assuming they are safe: Natural fragrances including lavender, tea tree, and citrus oils are common eczema irritants. ‘Natural’ does not mean non-irritating for compromised skin.
• Changing too many things at once: If you change detergent, diet, fabric, and skincare simultaneously and the eczema improves, you won’t know which change made the difference. Systematic, one-change-at-a-time testing is more useful.
• Assuming triggers are permanent: Children’s eczema and their triggers often change with age. Something that caused flares at six months may not at two years, and vice versa.

Trigger identification and management works well for mild-to-moderate eczema. Seek GP or dermatologist assessment when:

• Eczema is widespread, severe, or not responding to moisturiser and basic trigger avoidance
• You suspect a food allergy is involved — do not manage this without a clinical assessment
• Your child shows signs of skin infection (weeping, crusting, fever)
• Eczema is significantly affecting your child’s sleep, behaviour, or quality of life
• You are unsure whether what your child has is eczema or another skin condition

In Australia, a GP referral to a paediatric dermatologist or allergist is the appropriate pathway for moderate-to-severe eczema. ASCIA’s website (www.allergy.org.au) lists accredited specialists.

For the full picture of how fabric choice, fit, and clothing design interact with eczema management, visit the Nella Vosk Complete Guide to Eczema-Friendly Clothing: Fabrics, Fit & Science for Australian Families.

Related articles worth reading alongside this one:

• The Science Behind Bamboo Fabric for Eczema-Prone Skin
• Bamboo Clothing for Eczema Relief: Does It Work?
• Eczema Mittens vs Sleeves: Which Is Better for Babies?
• How Bamboo Sheets Help Soothe Eczema-Prone Skin