The Phantom did not become disfigured he was born like that. I know because in the ending, in the song Down Once More the Phantom says:
This face, which earned a mother's fear and loathing ... A...
According to the movie and musical, the Phantom was born with a disfigured face. We learn this in the song "Down Once More", when the Phantom speaks of his "face that earned a mother's fear and...
It depends on which version of 'The Phantom of the Opera' you are refering to.
In Andrew Lloyd Webber's musical, the Phantom sings about how he was born with a skin infection...which caused a...
He was born with the deformity. It is clearly implied in the original novel as well as in the stage musical and the 2004 film based on that novel. There are many film versions that go creative on the...