Nappy rash caused by antibiotics: what to know

Loose stools after Antibiotic Treatment can keep the skin damp and increase irritation. Changes in the usual balance of microbes may also allow a yeast rash to develop. Irritant rash often affects skin that is in contact with urine or stool; a yeast rash may be bright red, involve skin folds, and have small spots around the main area. A clinician needs to examine the rash before recommending a specific antifungal or steroid product.

The antibiotic may still be needed for the original illness, such as Acute Bronchitis, Cellulitis, Chlamydia, or another diagnosed infection. A rash alone is not a reason to stop a prescribed course without advice.

Change nappies promptly, rinse or clean with lukewarm water and a soft cloth, then pat dry. Give short periods without a nappy when practical and apply a simple protective barrier recommended for babies. Avoid fragranced wipes, harsh soap, talcum powder, and home mixtures. Do not use leftover treatment or share creams between children. Keep giving prescribed medicine unless the prescriber tells you otherwise, and report diarrhoea or a suspected medicine reaction.

Contact a clinician if the rash is spreading, very sore, blistered, bleeding, associated with fever, or not improving with gentle care. Seek urgent help for facial swelling, breathing difficulty, widespread hives, unusual sleepiness, or a baby who is feeding poorly. A rash with pus, warmth, or rapidly increasing tenderness may need assessment for Cellulitis.

Ask whether the appearance suggests irritation or yeast, whether the antibiotic should continue, which barrier or prescription treatment is suitable, and how to protect the skin if stools remain loose.