Ela recebe a cicatriz de Bellatrix Lestrange no livro 7, enquanto ela está em cativeiro na casa Malfoy.
No filme, isso ocorre na seguinte cena:
De acordo com Harry Potter Wikia :
Hermione has Mudblood written on her arm, a cut on her neck and many bites, all of them made by Bellatrix Lestrange, in 1998, at the Malfoy Manor
Como verificado no livro e também como comentado por Valorum:
Why shouldn’t I?” said Hermione. “Mudblood, and proud of it! I’ve got no higher position under this new order than you have, Griphook! It was me they chose to torture, back at the Malfoys!” As she spoke, she pulled aside the neck of the dressing gown to reveal the thin cut Bellatrix had made, scarlet against her throat.