This is probably the most common rash you will find in babies and toddlers, especially around the age of 18 months. Research says it is cause by skin being in prolonged contact with ammonia from urine or bacteria from stools burning or irritating the skin, which may then break open. But in some cases, the causes would be due to sensitive skin, rubbing or chaffing, strong soap, detergent or bubble bath, baby wipes, diarrhoea or illness, changes in diet such us weaning or due to changing from beast to formula milk.
I have been doing a lot of research before and found some useful information on preventing diaper rash on my little one. These are the things that will help prevent diaper or nappy rash on babies:
By changing the diaper as soon as you can when it becomes wet or soiled. By cleaning the whole diaper area thoroughly. Wipe the baby from front to back. Use a mild soap with plain water or a gentle baby wipes. Make sure that you rinse the soap and pat dry before placing a new baby diaper on your baby. It is also best to lay your baby in a towel and leave the diaper off for as long and as often as you can to let fresh air get to the skin.
Sometime rashes can lead into infection, so it is somehow important that you should keep your baby dry and clean at all time.