Iíve noticed in the last few days maybe week that the skin around my underarms seems to be very dry. Itís almost like the outside of a tank top area from front to back. Itís also visibly darker like I have a tan but Iím in the Northeast and havenít had a tank top on in months. Any thoughts on what this could be? I used a body scrub on it yesterday and lotion on it today. I havenít changed soap, lotion, or deodorant recently. TIA!!