I hve blck spot in my forehead, it appears for almst 1 year ago, its hve rough srfce, have blck colour, didn't hurt, 1mm, no content, can I peel if it too dry?

Need more info. It is difficult to diagnose skin lesions without seeing it. Black lesions are not all cancer but can be suspicious of cancer. You need to see your physician to make a diagnosis and for your peace of mind.