Diaper rash with blisters: treatment and warning signs

Nappy friction and moisture can damage the surface, but true fluid-filled blisters, peeling, crusting, or raw patches deserve closer review. The clinician may ask when the blisters appeared, whether they are spreading, and whether the baby has fever or feeding changes. Do not burst blisters or peel loose skin.

Change nappies often and rinse gently with lukewarm water. Pat dry, allow brief air exposure, and keep pressure off the sore area. A bland protective layer may reduce contact with urine and stool, but do not apply it over suspected infection unless advised. Avoid antiseptics, fragrance, talc, and adhesive dressings. [Emollient Therapy](/treatments/medical-dermatology/emollient-therapy/) may be discussed for protection, while [Topical Antifungal Treatment](/treatments/medical-dermatology/topical-antifungal-therapy/) is appropriate only when prescribed for a suspected fungal cause.

Arrange same-day medical advice for blisters, open sores, pus, yellow crust, spreading redness, warmth, marked tenderness, or a rash that is worsening. Seek urgent help if the baby has fever, is difficult to wake, feeds poorly, or has fewer wet nappies. A blistering rash in a young infant should not be managed solely with home treatment.

Ask what the blisters represent, whether a swab or examination is needed, which barrier is safe, how to clean the area, and what changes should trigger urgent review.