Caleb went through the big nasty rash period. Some even bled they were so bad. Our doctor and just about everyone we knew recommended Boudreaux's Butt Paste. Fun name. It worked so well it made our head spin! We also changed his diet a little. We added Stonyfield Farm YoBaby yogurt which has a soft formula and helps even out the rash producing parts getting through the digestive system. Your doctor may have some other ideas too. Thankfully for us the rash period didn't last too long. Unfortunately it was followed by the "so constipated I have to go to Children's Hospital" phase. As they say, "this too shall pass."

http://www.buttpaste.com/
http://www.stonyfield.com/