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 द्वारा 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 द्वारा one of the largest buffalo in Boma's herd causing a स्लैश 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 द्वारा 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 सेकंड movie covou (scar's mate's foster son ) was scratched द्वारा 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