I have very large breasts, and because they are so big they sweat a lot. So a friend told me to use deodorant between and under then. I did that for a week or two on a few random days throughout the end of the summer. Then the skin between my breasts started to get itchy, red, irritated, and felt very thin and plastic like. Its been about a month and a half and it hasn't gotten any better. My skin changes colors from a darker skin tone when its dry between them and starts to peel and crack; or a reddish color when its moist and gets puffy and really itchy. I don't know what's going on and why its lasting so long. What is it and what do I do about it?