User blog comment:Rachel6598/Hermione and Bellatrix: The Cruciatus Curse/@comment-3314848-20110721131239

Bellatrix obviously did carve into her arm with a dagger, but it looked to me that before she did, she did bite her, but she didn't bite "Mudblood" into her arm. It sounds stupid for anyone to bite someone, but lets not forget that this is Bellatrix Lestrange we are talking about.