This has been an extraordinarily hot summer. There are times when just walking my dog, I am soaked between and under my breasts. At first I just used Caldesene powder (an oldie). The rash itched horribly. I scratched it and it got worse. It seemed to start with old fashioned prickly heat and went from there. Someone told me to try Tinactin (like for athletes foot), so I did. Eventually it worked and went away. Now I'm just using Gold Bond powder? Do you know what it is? Thanks much.