question: Hi! I have extremely dry skin where my two butt cheeks meet, like in the crack of my butt. It itches terribly, and often leaves a burn of flakey dry skin in my underwear. I know that I have psoriasis on my scalp. I was just wondering if it can affect my butt cheeks and also my genital area? I ve had vaginal itch since I was young. Yeast infection medicines dont work, rarely will an anti-itch cream work. It was localized on one side of my vagina for 10 years and had since spread to both sides. My family doctor just says to use anti-itch, but I think there s a bigger issue or a better answer. The left (original) side had turned a darker color and is thicker. What exactly could be the issue?