Your baby’s bottom is soft, smooth and very sensitive. The skin is thinner than adults and has a higher pH level, making it vulnerable to irritation and infection. It also has to put up with difficult conditions, spending most of the day and night wrapped tightly in a hot, damp nappy and in regular contact with urine and faeces . It’s not surprising that it has a tendency to become red and sore.
Nappy rash is caused by a baby's delicate skin being in contact with the irritating chemicals in urine and faeces. This is made worse by a tight nappy which both rubs and stops the air circulating.

