It sounds like the area is constantly moist so it isn't staying dry and healing. I am not going to suggest cream or lotion because it will just make the problem worse. What I am going to suggest is that you thoroughly wash the area with a soap free cleanser and then rinse and dry the area thoroughly. Then use a cortizone cream on the area and make sure it is thoroughly rubbed in. After that use Desenex Powder on the area. (Desenex is an antifungal powder used for athlete's foot.) The Desenex will help keep the area dry so that the area will heal. The reason that the area is not healing is because there is constant skin to skin contact that keeps rubbing and irritating the area. What you have is most likely contact dermatitis. It can be annoying, maddening, horribly itchy. The reason the creams don't work is because when you perspire the area is constantly damp and therefore it just makes the problem worse. (Don't use sprays, use antifungal powder like Desenex that you have to use a powder puff to put it on with.) Hope this hopes. I know it has worked wonders for me.Not sure that this has anything to do with diabetes. But I have some problems with the skin in the creases. I have tried everything on the market and there is really nothing that I can use to help it. Most powders and creams just sting and cause more pain since the areas are raw. My dermatologist just told me to use some powder and to keep the area clean. I have a steroid cream that she told me that I could use, but it didn't help. If you find something that works, let us know.