What is nappy rash?

Nappy rash is a common form of skin inflammation (dermatitis) that appears as a patchwork of bright red skin on your baby’s bottom. Even the most cared-for babies can develop nappy rash at some time in their lives.

What does nappy rash look like?

Your baby’s skin will appear red, sore, and may be irritated, chapped or swollen in places.  Nappy rash can be isolated, with just a few prickly red spots in a small area, or more widespread with tender red bumps on your child’s inner thighs, particularly in skin folds and creases.

What causes nappy rash?

When your baby wets their nappy, bacteria can react with urine to form ammonia. This can “burn” your baby’s delicate skin. If a nappy is also soiled, this causes a different chemical reaction that can irritate and damage the skin even more.

Leaving a wet or dirty nappy on too long

Lengthy exposure to urine or stool combined with friction from movement, can irritate a baby's sensitive skin

Bacterial or
yeast (fungal) infection

A tight, closed nappy restricts fresh air and encourages warm moisture, the perfect breeding area for bacteria. These kinds of rashes are typically found in the creases of the skin


Tight-fitting nappies or clothing that rubs against the skin can lead to a rash


Changes in your baby's diet may also increase the frequency of stools, which can lead to nappy rash

from a new

Your baby's skin may react to baby wipes, a new brand of nappies or the ingredients found in some baby lotions and oils

How do I prevent nappy rash?

How do I treat my baby’s nappy rash when it does occur?

Gently cleanse the affected area with
a soap-free wash.

Pat or air dry the skin.

Sprinkle a layer of Caldesene at every change before putting on a fresh nappy (or as directed by your pharmacist or physician).

Let baby’s bum “breathe” whenever possible - put a large towel under your baby’s bum and let them play and kick about without a nappy to allow their skin to “breathe”. Fresh air is perfect for his/her skin.

How Caldesene Helps

Caldesene Medicated Powder can protect your baby from nappy rash in several different ways. It’s specially formulated to create a barrier against wetness on your baby’s skin. Being medicated, it attacks harmful bacteria and helps to prevent rashes.

Advisory Notes

For topical use only. Always read the label carefully before use.  Keep out of the sight and reach of children.  The active ingredient in Caldesene Medicated Powder is calcium undecylenate 10% w/w 20g, 55g & 100g pack sizes.

Reporting of side effects. If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed on this label. You can also report side effects directly via HPRA Pharmacovigilance, Earlsfort Terrace, IRL – Dublin 2; Tel: +353 1 6764971; Fax: +353 1 6762517. Website: www.hpra.ie; E-mail: medsafety@hpra.ie. By reporting side effects, you can help provide more information on the safety of this medicine.

Caldesene® is a registered trademark.
PA 126/152/1. PA Holder:  Clonmel Healthcare Ltd, Clonmel, Ireland.
Last revision date: April 2019   2019/ADV/CAL/080C