Age 56 weight 170 good health. Age spot on shoulder for many years (10), in past month it has raised and turned crusty. Along strap area, therefore does not get sun. Sunscreen when out on shoulders, etc. Crustiness is sometimes itchy, under crust is raw skin. Should I see dermatologist . At the same time, I had a new mole grow above breast which is flesh color but also crusty.