How does skin healing work?
Healing in the body is normally independent of the brain. Following an injury, a process of inflammation attracts lots of cells to the site of the injury (including platelets, white blood cells, clotting factors). There's also vasoconstriction (tightening of your blood vessels) to reduce blood loss from the injury site. Your skin cells continue to divide rapidly until new skin replaces the damaged one which later falls off. This is a highly simplified version of the process but hope it makes sense. So in summary, healing takes place by cell division (also known as mitosis).