My mom used Boudreaux's Butt Paste on my niece, Eden when she was a baby, and older. It really seemed to help A LOT..
I don't know if its available everywhere..

Here's a link to it, and theres a number to call for locations near you.
Link

My mom basically bought it because her maiden name is in the title, and thought it was humorous.. But it really did work, and my cousin started using it on their little boy.