I go to college and wear sandals in the dorm showers and found about a month ago that there was some raised skin that was a different color near the middle of my foot where the sandal rubs on the top of my foot, i bought some lotion thinking it was dry skin but now every now and then it gets very itchy and this morning it looked like a bunch of tiny raised red bumps very small but all in a contained area of about 1 inch by 1 inch as if its some sort of rash, i was wondering if anyone knew what was wrong?