A1. The main reason for this is that a baby’s skin is softer, thinner and more delicate than adult skin. It may look perfectly smooth and blemish-free but a baby’s skin is prone to all manner of rashes which are discussed in this guide. Another reason is that a baby has a less well developed immune system which means that he/she is prone to picking up diseases and infections, some of which result in a skin rash. Find out more in our baby skin section.