Eczema Baths for Children — Bath Oil, Pool Salt and Optional Bleach

If your child’s eczema is dry, itchy, stinging in the bath, or prone to crusting and infected flares, an eczema bath can be a useful add-on to your usual routine. The Royal Children’s Hospital (RCH) Melbourne recipe combines bath oil + pool salt, and in some cases bleach — all at safe, very dilute concentrations when measured correctly. ^(1,2,3,4,5)

Companion reading: daily routine for childhood eczema · triggers · medications for childhood eczema · wet wraps · infected eczema in children · diet and allergy testing

Who eczema baths help most

Eczema baths can be helpful when a child has:

• Very dry, itchy eczema that flares frequently
• Eczema that stings with normal bath water
• Recurrent crusting, weeping or infected-looking flares (especially when bleach is included) ^(2,3,5)
• Flare-ups that are slow to settle even with a good routine and medication plan

If eczema is mild and stable, you usually do not need special bath additives.

Safety first (read this)

Used correctly, eczema baths are safe — but accuracy matters. ^(1,2,3)

Use only:

• Plain pool salt (not perfumed “bath salts”) ⁽¹⁾
• Bath oil designed for sensitive skin (avoid strong fragrance) ⁽¹⁾
• If using bleach — plain, unscented household bleach (not “splashless”, not scented, no added cleaners) ^(1,2,3)

Avoid:

• Mixing bleach with other chemicals
• Getting bath water in the eyes
• Immersing the head under water — wet face and hair carefully without submerging ^(1,2)

If your child has rapidly worsening redness, pain, fever, spreading infection or painful blisters — skip the bath and follow infected eczema in children — red flags.

The RCH eczema bath recipe

RCH recommends per 10 litres of water: ⁽¹⁾

• Bath oil: 1–2 capfuls per bath (NOT per 10 L)
• Pool salt: 100 g (one-third cup) per 10 L of water
• Bleach (optional): 12 mL of 4% household bleach per 10 L of water

Other key RCH instructions:

• Bath temperature no hotter than 30°C (lukewarm) ⁽¹⁾
• Do not rinse off after the bath ⁽¹⁾
• Use fresh towels ⁽¹⁾
• Wet the face and head each bath without immersing ^(1,2,3)

Step-by-step — how to do an eczema bath at home

Step 1 — Fill the bath (cool to lukewarm)

• Aim for lukewarm water (RCH: ≤30°C) ⁽¹⁾
• Fill to your usual level

Step 2 — Add the ingredients (mix well)

Add to the bath water and swish around:

• Bath oil — 1–2 capfuls per bath ⁽¹⁾
• Pool salt — 100 g (one-third cup) per 10 L of water ⁽¹⁾
• Optional bleach — 12 mL of 4% bleach per 10 L of water (only if advised, or for infection-prone eczema) ^(1,2,3,5)

Step 3 — Soak

Soak for about 10 minutes. ^(2,3)

Step 4 — Wash face and head safely

You can wet the face and head gently with bath water, but do not submerge the head. ^(1,2,3)

Step 5 — Get out, pat dry and “seal”

• Pat dry (do not rub) ⁽¹⁾
• Apply your plan straight away:
  • Anti-inflammatory cream to active patches if prescribed, then
  • Moisturiser over the body (soak + seal principles from daily eczema routine) ^(1,4)

Adults and bigger baths — avoiding the “15 bucket problem”

RCH uses a 10 L bucket to count how many buckets fill the bath. ⁽¹⁾ That is great for accuracy — but if you are doing this as an adult, or your bath is large, you do not want to haul 15 buckets every time.

A practical approach:

• Measure once with a 10 L bucket and write it down
• Next time, fill the bath normally to the same level
• Multiply ingredients by the number of 10 L units

What is a typical bath volume? Many standard Australian household bathtubs hold roughly 150–200 litres when filled near the usual level.

Example — if your bath is 150 L, that is 15 × 10 L units, so you multiply:

• Pool salt: 100 g × 15 = 1500 g (1.5 kg)
• Bleach (if used): 12 mL × 15 = 180 mL

Bath oil remains 1–2 capfuls per bath (not per bucket), as per RCH. ⁽¹⁾

Tip: once you find your preferred bath waterline, mark it discreetly (e.g. a small dot on the inside edge), so you can repeat it reliably.

Where to buy bath oil and pool salt (Australia)

Pool salt:

• Bunnings (usually labelled “pool salt”)
• Pool supply shops
• Some supermarkets and hardware stores

Bath oil:

• Pharmacies (sensitive skin / eczema aisle)
• Supermarkets (sensitive skin section)

Choose a bland, fragrance-free or low-fragrance bath oil if possible — heavily perfumed products can irritate eczema-prone skin. ^(1,4)

How often should we do eczema baths?

This depends on severity and infection risk.

• For dry or irritable eczema (oil + salt only) — some families use it a few times per week during flare-prone periods ^(1,4)
• For infection-prone eczema (with bleach) — schedules vary, but often 1–3 times per week is used, with adjustment based on how the skin responds ^(2,3,5)

We will tailor frequency to your child’s age, eczema severity, infection history, and what is practical at home.

Rinse or not rinse?

The RCH eczema bath guidance advises do not rinse after bathing in salt/bleach/bath oil. ⁽¹⁾ Some other services suggest a brief rinse. ⁽³⁾

If you are following the RCH method, the key is:

• Pat dry
• Moisturise immediately afterwards ^(1,4)

When to stop and when to seek review

Stop and book a review if:

• Baths cause persistent stinging or worsening redness
• Eczema is not improving after 2–3 weeks of consistent use
• Your child keeps getting crusting or infected flares despite using the full plan
• You are unsure whether the eczema is infected

If your child’s eczema is hard to control, stings in the bath, or is frequently crusting or infected, book a consultation via the panel in the sidebar. Clinics at Ivanhoe and Diamond Creek.