Board Thread:Character Discussion/@comment-4637931-20150314222450/@comment-26255666-20150401062801

HP7hghrOUaTekscrrF10rrmc wrote: She had the scar in the episode with Daniel. It has to be a childhood thing. Maybe she fell off a horse.

It could be the beginning of the dissension between Regina and her mother Cora. Perhaps it's an accident when Regina is young and starts to see that her mom isn't as loving with her as her father is. Maybe even it's Regina stepping in to protect her father from her mother and gets scarred in the process?

Personally, I think the scar only adds to her character as "The [former] Evil Queen" so it just makes sense to use the scar. After all, Regina's character is scarred very much from her childhood and past so it's almost symbolic of everything she goes through in life.