Daily moisturizing starting in the first few weeks of life is the single most effective step you can take to lower your baby’s chance of developing eczema. A large clinical trial published in JAMA Dermatology found that full-body emollient application beginning before 9 weeks of age reduced eczema incidence by 16% overall, and by 25% in babies without a family history of the condition. Beyond moisturizing, a combination of smart bathing habits, early food introduction, and controlling your baby’s environment all play a role.
Why Some Babies Are More at Risk
Eczema has a strong genetic component. A baby with one parent who has eczema, asthma, or hay fever is two to three times more likely to develop eczema than a baby with no family history. If both parents have atopic conditions, the risk climbs higher still. That said, plenty of babies with no family history develop eczema, and plenty of high-risk babies never do. Genetics loads the gun, but the skin barrier and environment pull the trigger.
Start Moisturizing Early and Often
The skin barrier in newborns is still maturing, which makes it more vulnerable to drying out and letting irritants in. Applying a fragrance-free emollient to your baby’s entire body once a day, starting in the first few weeks of life, helps seal that barrier before problems begin. In the JAMA Dermatology trial, parents in the moisturizer group began daily application by the time their baby was about three weeks old and continued through 24 months. The control group, which used no regular moisturizer, had an eczema rate of 43% compared to 36% in the moisturizer group.
Thick creams and ointments work better than thin lotions because they create a stronger seal over the skin. Look for products with minimal ingredients. Petroleum jelly is one of the simplest, most effective options. Whatever you choose, apply it right after bath time while the skin is still slightly damp to lock in moisture.
Ingredients to Avoid in Baby Skincare
What you leave off your baby’s skin matters as much as what you put on it. Fragrances are one of the most common triggers for skin reactions, and “natural” fragrances like tea tree oil or lavender are just as likely to cause allergic reactions as synthetic ones. Products labeled “unscented” can still contain masking fragrances, so check for “fragrance-free” on the label instead.
A few other ingredients to steer clear of:
- Ethanol and other drying alcohols. Common in gel-based products, these evaporate quickly but can sting, burn, and dry out sensitive skin.
- Urea. Sometimes used as a moisturizing ingredient in adult products, urea can irritate a baby’s skin and disrupt its natural acid balance.
- Sodium lauryl sulfate (SLS). Found in many foaming cleansers and baby washes, SLS strips natural oils from the skin. Choose a mild, soap-free cleanser with a pH close to skin’s natural level (around 5.5).
Bathing: Less Is More
Short, lukewarm baths are gentler on a baby’s skin than long, hot ones. Aim for five to ten minutes in water that feels comfortable to the inside of your wrist, not hot. You don’t need to bathe a newborn every day. Two to three times a week is enough for most babies in the early months, unless they’re visibly dirty. Pat the skin dry with a soft towel rather than rubbing, and apply moisturizer immediately while the skin is still damp.
Introduce Allergenic Foods on Schedule
For years, parents were told to delay common allergens like peanuts and eggs. That advice has been reversed. Major pediatric organizations around the world, including the American Academy of Pediatrics, now recommend introducing allergenic foods around 4 to 6 months of age, not later. Early introduction helps train the immune system to tolerate these foods rather than react to them, which can reduce the cascade of allergic conditions that often accompanies eczema.
The specific timelines depend on your baby’s risk level. For babies with severe eczema or an existing egg allergy, the AAP recommends allergy testing first, followed by peanut introduction as early as 4 to 6 months. For babies with mild to moderate eczema, peanut-containing foods can be introduced around 6 months. For low-risk babies, allergenic foods can also go on the menu at about 6 months alongside other solids. In all cases, start after your baby has successfully eaten other solid foods and is developmentally ready.
Control the Indoor Environment
Your baby’s bedroom and living spaces have a bigger effect on skin health than most parents realize. Research has identified several household factors that raise eczema risk in young children.
High indoor humidity and humidifier use have both been linked to increased eczema rates in multiple studies. This may seem counterintuitive since dry air can irritate skin, but overly humid environments encourage dust mites, mold, and other allergens to thrive. A comfortable middle ground, typically 40% to 50% relative humidity, is ideal. If you use a humidifier in winter, monitor levels with an inexpensive hygrometer.
Synthetic bedding materials, including synthetic pillows, are associated with higher eczema risk. Cotton or bamboo fabrics that breathe well and feel soft against the skin are better choices for crib sheets and sleepwear. Regular airing of bedsheets and frequent room cleaning also help by reducing dust mite exposure. Electric space heaters in bedrooms were another risk factor identified in research, likely because they dry the air unevenly and stir up particulates.
What Pregnant Parents Can Do
There is some evidence that maternal diet during pregnancy influences eczema risk. A cohort study published in Frontiers in Nutrition found that mothers who ate more poultry-heavy diets during pregnancy had the highest rates of infant eczema (61%), while mothers whose protein came primarily from plant sources or from dairy and eggs had significantly lower rates (46% and 48%, respectively). The plant-based protein pattern was associated with a 43% lower risk of infant eczema compared to the poultry-heavy pattern, and the dairy-and-eggs pattern with a 52% lower risk.
This doesn’t mean you need to avoid chicken entirely. But eating a varied diet during pregnancy, with protein spread across plant sources, dairy, eggs, fish, and meat rather than concentrated in one category, is a reasonable approach supported by the data. Restrictive elimination diets during pregnancy, where mothers cut out common allergens like milk or nuts, have not been shown to prevent eczema and are generally not recommended.
Probiotics: Promising but Uncertain
Giving probiotics to pregnant mothers or newborns has generated interest as a prevention strategy, but the evidence remains inconsistent. Some studies suggest that specific bacterial strains, particularly Lactobacillus rhamnosus GG combined with certain Bifidobacterium species, may help reduce eczema in high-risk infants. However, a randomized trial of Lactobacillus rhamnosus GG alone in high-risk babies found no reduction in eczema or asthma by age two. The effects appear to vary significantly depending on the exact strain, dose, and timing, and no medical guidelines currently give a strong recommendation for or against probiotic use for eczema prevention. If you’re considering probiotics, the strain combination matters more than simply picking any probiotic off the shelf.
Putting It All Together
The strategies with the strongest evidence are also the simplest: moisturize daily from early infancy, use gentle fragrance-free products, keep baths short and lukewarm, introduce allergenic foods on time rather than delaying them, and keep your baby’s environment clean without making it excessively humid. None of these steps guarantees your baby won’t develop eczema, especially if there’s a strong family history. But taken together, they meaningfully lower the odds and give your baby’s skin barrier the best chance to develop properly.