It's normal for babies to develop skin rashes from as early as a few days old, as their sensitive skin adapts to a different environment. Most rashes are harmless and go away on their own.
However, if your baby has developed a rash and seems unwell, or if you're worried, see your GP to find out the cause and for any necessary treatment. It's especially important to be aware of the warning signs of meningitis.
This guide may give you a better idea of the cause of the rash, but don't use it to diagnose your baby's condition by yourself. Always see a GP for a proper diagnosis.