You can significantly reduce eczema flare-ups and even lower the risk of developing eczema in the first place by protecting your skin barrier, avoiding known triggers, and controlling your environment. There’s no single cure, but the combination of daily moisturizing, gentle hygiene habits, and smart product choices makes a measurable difference.
Strengthen Your Skin Barrier Daily
Eczema-prone skin loses moisture faster than normal skin because it lacks enough of the natural fats that hold the outer layer together. These fats, called ceramides, create a moisture barrier, regulate your skin’s pH, and control inflammation. When that barrier breaks down, allergens and bacteria slip through more easily, triggering the itch-scratch cycle that defines eczema.
The most effective daily habit is applying a thick, fragrance-free moisturizer immediately after bathing, while your skin is still slightly damp. Look for creams or ointments that list ceramides as an ingredient, since these directly replenish what eczema-prone skin is missing. Lotions are thinner and evaporate faster, so they’re generally less effective. Petroleum jelly is another reliable option because it seals moisture in without added irritants.
For infants, the evidence is especially strong. A 2025 randomized clinical trial of over 1,200 babies found that applying moisturizer daily starting before 9 weeks of age reduced the rate of eczema by 16% by the time children turned two. For babies without a family history of eczema, the protective effect was even larger, cutting risk by 25%. This is one of the simplest, safest preventive steps parents can take.
Know Your Triggers and Avoid Them
Eczema flares are often set off by contact with specific irritants or allergens in everyday products. The five most common categories, according to the FDA, are fragrances, preservatives, dyes, natural rubber (latex), and metals like nickel and gold. The challenge is that many of these hide under chemical names on ingredient labels.
Fragrances are the biggest offender. The European Commission has identified 26 fragrance compounds that cause allergic reactions, and they show up in everything from body wash to laundry detergent. Rather than memorizing a long chemical list, the simplest approach is to choose products labeled “fragrance-free” (not just “unscented,” which can still contain masking fragrances).
Preservatives are the second major category to watch. Formaldehyde-releasing ingredients like DMDM hydantoin, diazolidinyl urea, and quaternium-15 are common in shampoos and body washes. Methylisothiazolinone (often listed as MIT) is another frequent culprit found in liquid soaps and wet wipes. If you notice flares that seem connected to a new product, check the label for these ingredients first.
Hair dyes containing PPD (p-phenylenediamine), nickel in jewelry or belt buckles, and latex in gloves are also well-documented triggers. If you’re unsure what’s causing your flares, a patch test through a dermatologist can identify specific allergens so you can avoid them with confidence.
Bathing Habits That Protect Your Skin
Hot water strips natural oils from your skin and leaves the barrier more vulnerable. Keep baths and showers lukewarm, and keep them short. While there’s no precise cutoff backed by strong evidence, dermatology guidelines generally recommend limiting baths to 10 to 15 minutes. Use a gentle, soap-free cleanser rather than traditional bar soap, which tends to be more alkaline and more drying.
Pat your skin dry with a soft towel instead of rubbing, and apply moisturizer within a few minutes. This “soak and seal” approach traps water in the outer skin layer and reinforces the barrier before it has a chance to dry out.
How Hard Water Makes Eczema Worse
If you live in an area with hard water (high in calcium and magnesium), your skin barrier is working against an extra challenge. Hard water makes soap and detergent harder to rinse off, leaving residue on your skin that irritates the outer layer and dissolves protective fats. The calcium and magnesium themselves raise your skin’s pH, pushing it away from its naturally slightly acidic state, which weakens the barrier and allows allergens and bacteria to penetrate more easily.
Chalk-like particles that form when soap reacts with calcium add another layer of irritation. Research from the UK Biobank has linked higher domestic water hardness to increased eczema prevalence in adults. If you suspect hard water is contributing to your symptoms, a water softener or showerhead filter can reduce mineral content. Using a soap-free cleanser also helps because it produces less residue in hard water than traditional soap does.
Control Your Indoor Environment
Dry indoor air pulls moisture from your skin and can trigger or worsen flares, especially during winter months when heating systems run constantly. The National Eczema Society recommends keeping indoor humidity between 30% and 60%. A simple hygrometer (available for a few dollars) lets you monitor levels, and a cool-mist humidifier can bring dry rooms into the target range.
Dust mites are another common indoor trigger. Washing bedding weekly in hot water, using allergen-proof mattress and pillow covers, and vacuuming with a HEPA filter can reduce exposure. Keep bedroom temperatures comfortable but not overly warm, since sweating is itself a frequent flare trigger.
Choose the Right Fabrics
What you wear sits against your skin all day, so fabric choice matters more than most people realize. Wool and synthetic fabrics tend to cause itching and irritation. Cotton is the traditional recommendation, but it’s not perfect: cotton fibers are short and expand and contract with movement, creating a subtle rubbing effect that can irritate sensitive skin. Dyes used in cotton clothing also carry a risk of allergic reactions, and cotton is more susceptible to harboring bacteria and fungi.
Silk can feel soothing, but tightly woven silk traps heat and restricts airflow, and some people react to a natural protein in silk called sericin. Specially treated silk fabrics with the sericin removed and a looser knit have shown benefits in studies of both children and adults with eczema. If you stick with cotton, choose soft, undyed or lightly dyed garments, wash them before first wear, and use a fragrance-free, dye-free detergent.
Probiotics for Infant Prevention
For parents with a family history of eczema hoping to reduce their child’s risk, probiotic supplementation has shown promise when the timing and approach are right. A systematic review and meta-analysis found that a mixture of probiotic strains given to mothers during pregnancy, continued while breastfeeding, and then given directly to the infant was the most effective strategy for reducing eczema risk in children. Single-strain probiotics were less effective than multi-strain combinations.
This protective effect held for both high-risk children (those with a parent or sibling who has eczema or allergies) and children without elevated risk. If you’re considering this approach, discuss specific products and timing with your child’s pediatrician, since not all probiotic formulations contain the same strains or doses.
Vitamin D and Eczema Severity
Vitamin D plays a role in immune regulation and skin barrier function, and low levels are common in people with eczema. A meta-analysis of randomized controlled trials found that vitamin D supplementation above 2,000 IU per day reduced eczema severity, while doses at or below 2,000 IU per day showed no measurable effect. This suggests that modest supplementation isn’t enough to move the needle, and that higher doses may be needed to see a benefit.
Getting your vitamin D level checked through a simple blood test can help you and your doctor determine whether supplementation makes sense for you and at what dose. Sun exposure also boosts vitamin D naturally, though too much sun can itself trigger flares in some people, so short, controlled exposure is a better strategy than prolonged sunbathing.