User blog comment:B214/Question & Answers 5/@comment-64.134.184.169-20150509155228/@comment-3965848-20150509161055

I think maybe the wound might have been already healing itself which would already leave a scar. It probably wasn't too deep to be fatal since he most likely did it to himself so he might have had time before meating Asia for it to heal itself.

That's my theory.