I had a diaper rash that started in the thigh's and spread to the point it was unbearable. Used all the different diaper rash creams I could find and nothing helped. Try an ointment with Clotrimazole. It gave almost instant relief but did take a few weeks to clear up( I did deal with it for almost a painful month before I figured out what it was) The Walgreens around me carries it in the area where they have the stuff for the feet. Lesson learned the hard way. Don't wait till a rash starts to use Desitin. I use it always and have not had a diaper rash in 2 years. Hope that helps.