Watch for Baby Skin Infections

Unfortunately, babies are more prone to becoming infected by bacteria, fungus, and virus.
Their immune systems are still in its developmental stages, and their systems have had no prior exposure to typical childhood illnesses like chicken pox.
Generally, a parent will be able to see a skin infection for what it is; often the baby will be visibly ill, and the skin rashes will be far more severe than is the case with other irritations.

Read, these articles, know what you are dealing with, and when you need to call the pediatrician.