There might be a possibility that this is a fungal issue. I took a drop of tea tree oil and rubbed it on my temple, as a test. I could feel some skin cells rubbing off, and I notice that using the slicker brush that there are some areas that get quite flaky. So, it looks like the skin cells are not being shed properly. I've recently added collagen and MSM to my supplement list, and I've noticed improvements in my skin in a few months. Also added vitamin A, so it might be a nutritional deficiency that causes the skin cells to hang on when they shouldn't. Basically like a callous. I might be seeing some sparse, although diffuse, growth. Difficult for me to take pics so far, but I'll figure something out.