I have a brown scaly patch about 1cm across, which I assume is the same, I’ve never mentioned it to my GP because I was happy that’s what it was, and there isn’t anything you can do, except keep blood glucose under control. I developed it probably as a result of having high blood sugars for months (after a misdiagnosis of Type 2 when I was actually Type 1). 15 years later it’s still there, it doesn’t bother me, it doesn’t change or get any bigger, in fact it may have faded slightly, but it’s still dry, and it’s just there.