I’m in my 40s, and for several months I’ve had an itchy patch on my neck that seems to get worse the more I scratch it. At first it was just a mild irritation, but over time the skin has become thicker and rougher, almost leathery to the touch, and the urge to scratch is strongest at night when everything feels quiet and I’m more aware of the itch. I’ve also noticed a similar spot beginning on one of my arms.