Bathing and moisturizing when your child has eczema

If you only change one thing about how you care for your child’s eczema, make it this: a short, lukewarm bath, then moisturizer on damp skin within a few minutes. Dermatologists call it “soak and seal”, and it’s the base that everything else, including prescription creams, sits on. Here’s how to do it, how much moisturizer is enough, and where bleach baths fit in.

Why does bathing help eczema at all?

Parents often hear that water dries skin out, so they cut back on baths. In eczema, the opposite approach works better. Water soaks into the outer layer of skin and rehydrates it; the problem is what happens afterwards, when that water evaporates and takes more with it. Moisturizer applied while the skin is still damp traps the water in. That’s the “seal”.

A 2021 review in Canadian Family Physician looked at what evidence exists and concluded that frequent plain-water bathing, with mild soap only as needed, followed by immediate moisturizer is the approach to recommend. One small crossover trial it cites found that twice-daily baths with moisturizer improved eczema in far more children than twice-weekly baths. The reviewers were honest that there’s no high-level evidence for exact temperatures or durations, so the guidance below is practical consensus rather than hard rules.

How to do “soak and seal”

• Fill the tub with lukewarm water, not hot. Hot water feels good on itchy skin for a minute and then makes the itch worse. The Eczema Society of Canada and the American Academy of Dermatology both say warm, not hot.
• Keep it short: 5 to 10 minutes. Long soaks leave skin waterlogged and more fragile.
• Skip the bubble bath. Use a mild, fragrance-free cleanser only where it’s needed: hands, feet, the diaper area, and anywhere visibly dirty. The rest of the body needs only water. If you want to compare gentle options, the cleansers page on this site lists products whose claims have been reviewed.
• Don’t scrub. Wash with your hands or a soft cloth.
• Pat, don’t rub. Lift your child out and pat the skin with a towel until it’s damp, not dry.
• Apply prescribed medication first, if your doctor has given you a cream for flares, to the patches that need it, following your doctor’s instructions.
• Then moisturize everything else, generously, within about three minutes. Smooth it on in the direction the hair grows rather than rubbing it in, which helps avoid blocked hair follicles.

That’s the whole routine. It takes a few minutes, and it’s the same every day, which is why it works.

What kind of moisturizer?

The word doctors use is emollient, which just means a product that softens and moisturizes skin. They come in three main textures, and the NHS sums up the trade-off well:

• Ointments are greasy, contain little or no water and hold moisture in the longest. They suit very dry or thickened skin and bedtime, when the greasy feel doesn’t matter.
• Creams absorb faster and are easier for daytime, school and hands.
• Lotions are lightest and spread easily but wear off soonest, so they’re rarely enough on their own for eczema.

A 2017 Cochrane review of 77 trials found that moisturizers prolong the time between flares, reduce the number of flares and reduce the amount of steroid cream needed, but it did not find reliable evidence that any one moisturizer is better than another. The American Academy of Dermatology suggests thick creams or ointments for children and finding what works by trial and error. In practice: fragrance-free, thick enough to last, and something your child tolerates well enough to use daily. The moisturizers page on this site lists products whose claims have been reviewed.

Two cautions. Check for a reaction on a small patch first when you try a new product. And if a moisturizer stings on flaring skin, that’s not the child being difficult; try a different texture or a different product.

How much, and how often?

More than you think, and more often than you think. Most parents under-apply. The NHS says emollients can be used as often as you like, ideally at least three or four times a day, and the American Academy of Dermatology says at least twice a day. After the bath is non-negotiable; the rest can be at breakfast, after school, before bed, or whenever the skin looks dry or your child starts to scratch.

For amount, aim for a visible layer that takes a moment to absorb, rather than a thin smear that vanishes instantly. A tub or pump that lasts months is a sign you’re not using enough. Keep a container wherever your child spends time, including the school bag for older kids.

Do bath additives help?

Mostly no. The Canadian Family Physician review cites a large trial of 482 children in which adding emollient bath oils to the water made no difference after a year, and concludes that bath additives don’t add benefit. The Eczema Society of Canada likewise recommends plain warm water without soap or bubble bath. Oatmeal baths are popular and soothing for some children, but they’re a comfort measure, not a substitute for moisturizer afterwards. Whatever you add or don’t add, it’s the seal that matters.

One more thing to leave out of the bath: fragrance. The American Academy of Dermatology recommends a mild, fragrance-free cleanser for children with eczema, and scent adds nothing a bath needs.

Bleach baths: only with a doctor

You’ll read about dilute bleach baths in eczema forums, and your doctor may bring them up if your child’s eczema keeps getting infected. They’re a real medical treatment: a very small, carefully measured amount of household bleach in a full tub, meant to reduce the bacteria that live on eczema-prone skin.

Two things to know. First, the evidence is mixed: the Canadian Family Physician review found no significant difference in eczema scores between bleach baths and plain water baths in the studies it examined, though some doctors still find them useful for specific children. Second, this is not something to improvise. The American Academy of Dermatology says to talk with a dermatologist before starting, and its instructions include never applying bleach directly to the skin, adding it to the water while the tub fills, soaking for 5 to 10 minutes, and moisturizing immediately after. The right amount depends on the tub size and the bleach concentration, and getting it wrong can irritate skin or eyes. If your doctor recommends bleach baths, get the exact instructions from them and follow them precisely; if nobody has recommended them, don’t start.

When soak and seal isn’t enough

Bathing and moisturizing keep skin in good condition and reduce flares, but they don’t always stop them. If the skin is red and itchy despite a solid routine, your child needs an anti-inflammatory treatment from a doctor, and there’s no failure in that. The Eczema Society of Canada’s guidance is simple: use prescription creams exactly as the prescriber directs.

See your doctor or pharmacist if the eczema isn’t better after two weeks of daily soak and seal, if itch is costing your child sleep, or if the rash is widespread. See a doctor promptly if the skin oozes, forms honey-coloured crusts, has pus-filled spots, becomes painful, breaks out in clusters of small blisters, or if your child has a fever alongside a sudden flare. Those are signs of infection, and moisturizer alone won’t fix them.

Short, lukewarm, gentle, then seal it in. Do that every day, use far more moisturizer than feels reasonable, leave the additives on the shelf, and save bleach baths for a doctor’s instruction. It’s the least glamorous part of eczema care, and the part that makes the biggest difference.