Telling Baby Rashes Apart

Something has come up overnight and you are holding your phone over her, trying to work out whether it matters.

Her skin reacts to almost everything: friction, heat, detergent, saliva, a new food. Most of what appears is harmless and passes.

Telling them apart matters because the treatments differ, and the wrong one delays the right one, sometimes by weeks.

The five you will meet

Nappy rash. Redness in the nappy area. Early, faint redness or small red dots. Severe, bumps with fluid or yellowish crusting.

Caused by friction from a nappy that does not fit, or skin staying wet. Diarrhoea and harsh detergent both make it worse.

Eczema. Usually atopic in babies. Itchy, dry or cracked skin, sometimes blistered and weeping, sometimes thickened, and red.

Elbows, arms and skin folds like the backs of the knees. Sensitive skin, allergy, weather, food and insect bites can all set it off.

The giveaway is the itch, and that it comes and goes rather than steadily clearing.

Hives. Raised swellings, often paler in the middle, hot and stinging. Triggered by food, medicine, mosquito or mite bites, a bee sting, or extreme temperature.

Hives with swelling of her face, lips or tongue, or any difficulty breathing, is an emergency rather than a rash.

Heat rash. Hot humid weather plus covered clothing. Itchy red spots with mild swelling, on her head, neck, arms, shoulders or legs.

The one that resolves fastest, usually by cooling her down and putting her in less.

Baby acne. Reddened skin with small red or white bumps, in around 20% of newborns. First weeks, and it clears on its own.

Telling them apart quickly

General care

• Keep her skin clean and dry
• Take the trigger away where you can find it: a food, a cleaning product, friction, heat, insect bites, humid air
• A rash cream on the nappy area at every change, gentle and free of irritants

Mama's Choice Baby Rash Cream uses 8 natural ingredients, absorbs quickly, and works across the body for milk rash and insect bites as well as under a nappy.

"Easy to spread, not too sticky. Rash creams like this are usually sticky and hard to spread." Home Panel Test feedback.

The part that matters most

Baby rash is not one condition, and one cream does not handle all of them.

Baby acne is not always fungal. The red spots on a newborn's face generally clear within weeks without treatment. Some cases are linked to Malassezia yeast, and not all, so calling every case a fungal infection is wrong.

Eczema, fungal infection and irritant nappy rash need different treatment. A barrier cream helps mild irritation and nappy rash. It does not treat eczema or an infection, and both of those need assessment and medicine from a doctor.

A fungal nappy rash is bright red with a well-defined edge, often with small spots scattered around it, and it does not improve with a barrier cream alone.

About the "3 applications" figure

It comes from an internal efficacy test, the Mama's Choice Efficacy Test 2021 (n=30), on nappy rash and mild irritation. A use test like that records improvement reported by participants in those conditions. It is not a clinical trial demonstrating a cure for every type of rash. The full figures and their sources are on the evidence page.

See a doctor if

• The rash produces pus, or blisters
• It comes with a fever
• It spreads quickly, or beyond the nappy area onto her arms, face or scalp
• It has not improved after a few days of care at home
• She cries in pain at every nappy change
• There is swelling of her face or lips, or any difficulty breathing

That last one is not a rash to manage at home. It needs emergency care.