Why does my baby keep getting diaper rash when we bath him every night?

My 11-month-old son keeps getting nappy rash even though we give him a bath every night. We use Desitin nappy rash cream and Pampers nappies. What could be the problem?

Nappy rash has many causes, but most cases are related to skin irritation from moisture in the nappy area. Changes in the skin pH, damage from proteins found in the stool, and secondary infection with bacteria or yeast can further aggravate skin irritation. You are already doing many of the right things: daily bathing, using a super-absorbent disposable nappy, and applying a skin protectant. Be sure to change his nappy regularly throughout the day and apply the skin protectant at every change: the less time the skin is exposed to moisture, the better. After bathing, dry the nappy area completely and then apply the skin protectant. Plain petroleum jelly or a thick cream that comes in a tub would be a better choice for forming an effective artificial barrier on the skin to protect it from further damage. If you see any small red bumps, especially if you also see white pus bumps, your son may have a yeast infection. If this is the case, or if the measures above do not lead to improvement within one week, have him examined by his GP. Don't worry - even stubborn cases clear with toilet training!