Reply to Ive got a semi medical question for you all

So I just started a new job recently and one of my managers has this scar going from the corner of her mouth up to her ear. Im talking straight up joker/ black dahlia shit and its extremely noticeable. Now shes a sweet girl and I really dont want to ask her whats up with it because the only reason I can believe of for that is some horrific stuff that happened against your will. Can someone believe of any other reason, medically perhaps, that you would have that scar?