As a teenage lion, Scar's original name was Taka. Taka was angry at his father and jealous of Mufasa. He tried to trick Mufasa into going to the waterhole, guarded 由 a buffalo named Boma. Mufasa tried to reason with Boma to share the water. Boma came after Mufasa and Taka. Mufasa escaped safely, but Taka was injured 由 one of the largest buffalo in Boma's herd causing a 斯莱什 across his eye. This healed into a scar thus the name "Scar".
There are diffrent stories about how Scar actually got his Scar, one is that his father Ahadi gave it to him, another is that a buffalo did it, here's a part from the book:
Scar, called Taka before receiving his scar, tricks Mufasa into looking like he started trouble with a water buffalo named Boma. Scar's plan backfires when Mufasa escapes to safety, but Taka isn't so lucky and gets scratched across the face 由 a member of Boma's herd. Taka asks to be called Scar from then onwards as a sign of his foolishness.
Ive watch the lion king a millon times and it dosnt say how he got the scar but i do know that in the 秒 movie covou (scar's mate's foster son ) was scratched 由 scars mate
I think it was because Mufasa and him got into a fight over at the water hole 'cuz Taka was jealous of him and he decided to pick a fight with his big bro