Taken from Wikipedia
Tévez has a distinctive burn mark from his right ear, down his neck
to his chest. This occurred when he was ten months old while he was
exploring his mothers kitchen floor and he inadvertently pulled a
kettle of boiling water over himself. This caused third-degree
burns to the right side of his face, neck and chest and left him in
intensive care for almost two months. Today, the scars are a highly
visible feature of Tévez, who did not get them fixed because he was
playing in a junior football team. He refused an offer from his
then club, Boca Juniors, to have them cosmetically improved, saying
that the scars were a part of who he was in the past and who he is
today.