What is the red thing on mikhail gorbachevs head?

The red thing on Mikhail Gorbachev's head is a prominent birthmark known as a port-wine stain. It is located on his forehead and has become a recognizable feature of his appearance. This mark has drawn attention and has often been a topic of discussion in media portrayals of him. Gorbachev's birthmark symbolizes his unique identity in the context of his significant role in history as the last leader of the Soviet Union.