Barrier Creams

Barrier creams are thick protective products, sold as ointments, pastes or creams, that sit on the skin surface as a film between the skin and irritants. DermNet groups their ingredients as occlusives, which do not dissolve in water (Petrolatum, silicone/dimeticone and zinc oxide), and humectants, which draw water into the skin (Glycerol and urea). Petroleum-based products reduce water loss best. Dimeticone products are less greasy. Some newer products add Ceramides or nicotinamide to support barrier repair. A barrier cream persists for several hours, even after gentle washing.

Petrolatum [part-of] Barrier Creams Barrier Creams [prevents] Irritant Contact Dermatitis

Where toddlers need them: nappy and drool areas. In 1–4-year-olds the two main uses are irritant Nappy Rash and Drool Dermatitis. Both are forms of Irritant Contact Dermatitis, caused by urine and faeces in the nappy area and by saliva, food and constant wiping around the mouth and chin. NHS and DermNet advice for nappy rash is a thin layer of a petrolatum and/or zinc oxide barrier at every change, combined with prompt changes, water cleansing and nappy-free time. For drool rash and Lip-Licker’s Dermatitis, a greasy ointment such as plain petroleum jelly is applied before meals, naps and bed so that saliva and food do not reach the skin (Children’s Mercy 2024; Healthline). Eczema on the trunk and limbs is managed with Emollient Therapy, which covers wider areas and is applied more generously. Barrier products are for the wet, friction-prone zones.

Barrier Creams [prevents] Nappy Rash Barrier Creams [treats] Drool Dermatitis

Strength of evidence. That keeping irritants off the skin prevents irritant dermatitis is well established, and barrier care is first-line in every guideline reviewed here. The product-level evidence is weaker. The vault found no good head-to-head trials of zinc oxide against petrolatum in toddlers, and no randomised trials for drool rash. Barrier creams do not treat inflammation. A nappy rash that persists despite good barrier care needs review for candida (Candidiasis), Seborrhoeic Dermatitis or infection, and may need a short course of mild Hydrocortisone or an antifungal (DermNet; NHS). Children’s Mercy notes that zinc oxide cream is not usually effective for Perioral Dermatitis, which can mimic drool rash. The evidence level is therefore rated moderate.

Barrier Creams [relates] Seborrhoeic Dermatitis

Toddler safety. DermNet says barrier creams are usually well tolerated. Uncommon Allergic Contact Dermatitis can occur to preservatives, fragrance or other ingredients, and most products should not be applied to broken skin. Many baby balms and nipple creams contain Lanolin, a known paediatric sensitiser that is more often positive in children with eczema. Fragrance-free products are preferred (Fragrance Allergy).

Peanut (arachis) oil in some zinc ointments

Zinc and castor oil ointment is listed by Medsafe (2012) among medicines containing peanut oil, and UK BP versions list Arachis Oil. Refined oil has most protein removed, but caution is advised in peanut allergy, and repeated application to inflamed skin is a theoretical route to Peanut Oil Sensitisation. Check labels for “arachis oil” / Arachis hypogaea before using nappy ointments on a toddler with eczema.

Arachis Oil [part-of] Barrier Creams Lanolin [causes] Allergic Contact Dermatitis

What parents report (evidence: anecdotal). In toddler forums, parents describe thick petroleum-jelly or zinc barriers put on before acidic foods and at bedtime for chin rash. Many find the rash keeps coming back until teething settles. Several report that a “drool rash” which would not respond to barrier ointment turned out to be perioral dermatitis or yeast (see Drool Dermatitis).

Connections

• Nappy Rash — first-line prevention at every change, source: NHS; DermNet 2017
• Seborrhoeic Dermatitis — for nappy-area involvement, source: NHS cradle cap
• Petrolatum — main occlusive base; best at reducing water loss, source: DermNet barrier cream 2017
• Drool Dermatitis — barrier ointment before meals, naps and bed, source: Children’s Mercy 2024; Healthline
• Irritant Contact Dermatitis — barrier creams prevent irritant contact, source: DermNet
• Lanolin — common ingredient; paediatric sensitiser, source: Tam & Yu 2022
• Arachis Oil — present in zinc and castor oil ointment, source: Medsafe 2012
• Perioral Dermatitis — zinc oxide not effective, source: Children’s Mercy 2024