My favourite diaper cream is called Sudocrem. Usually a grey jar and label is red and white or has been up until the last one I bought although that was about 6 months ago. But I have had the best success with this cream and that is what we used on the child with the stubborn rash.

If you think the rash is a yeast infection you can try clotrimozole cream - it will say for use on athletes foot and jock itch but it kills the germs that are causing the repeated infection. One of the creams you can get from the doctor is a mixture of the clotrimozole and cortizone but you pay a lot more than buying the tube itself. This came many years ago from a child that had diaper issues and the mom got tired of going back for another presscription and went into the drug store to ask could they please just refill and the pharmacist showed her the clotrimozole and said it was the active ingredient in what the doctor had prescribed for a fraction of the cost not to mention a large tube.