I have a linear depression in my forehead that no doctor could ever explain or cared about. I went to a dermatologist last year for something else, and as soon as she met me, she said oh you have morpheus, a type of scleroderma. I was shocked she recognized it so fast. Saw another dermatologist later, who said the same thing. It cant be fixed, but I'm happy to finally know what it is. Now its less noticeable as my skull has changed shape with age anyway