A nappy rash may occur when the skin of the baby is irritated by the contents of poo and wee in the nappy. The skin becomes red and also raw because of the bacteria and the germs that have been penetrating the skin layer that gets exposed because of the irritants.
The best possible way to take care of the situation is to change the diaper of your baby on a regular basis but that will not be enough to keep away from nappy rashes in the case where your baby is wearing nappies all the time. When you are changing the nappy of your baby, you have to make sure that you have cleaned the area thoroughly with a soft cloth and warm water. You can also use cotton wool for cleaning the area that has been affected by rash. Make sure that the area is well dried after you clean them.