I had a friend who's earring backs got stuck inside her earlobe and now she wants to get them repierced?

My friend used to have her ears pierced but the backs got stuck in her earlobe and she had to pull them out herself. They kinda left a scar where the hole used to be and she wants to get them re pierced but she doesn't know if it's a good idea or not. Is it safe for her to get them redone?