What should you know about newborn diaper rash?

The rash may look pink or red across skin that touches the diaper. Frequent stools, loose stools, tight diapers, and scented wipes can increase irritation. Skin folds may stay clearer when the main problem is simple contact irritation; a rash that is bright red in the folds, has small spots around its edge, or keeps spreading may need assessment for yeast or another cause.

The appearance alone cannot confirm a milk allergy. A clinician considers feeding history, stool changes, vomiting, breathing symptoms, and the timing of the rash before suggesting dietary changes.

Change wet or soiled diapers promptly. Clean with lukewarm water and a soft cloth, or use a fragrance-free wipe, then pat rather than rub. Allow brief diaper-free time when practical and use a generous protective barrier recommended for newborn skin. Keep the diaper comfortably loose. Avoid talc, fragranced products, and home mixtures. [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/) may help protect irritated skin; a clinician may recommend [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) when yeast is suspected.

Contact a clinician if the rash has blisters, open sores, bleeding, pus, marked swelling, or rapidly increasing redness. Seek prompt advice if your newborn has a fever, seems unwell, feeds poorly, or has fewer wet diapers. Arrange a review if the rash is not improving with gentle care, repeatedly returns, or involves the skin around the anus with significant soreness.

Ask which cleanser and barrier product to use, whether the folds are involved, and what features would suggest yeast or infection. Mention recent antibiotics, diarrhea, new wipes, diaper brands, and any feeding symptoms before changing formula or your own diet.