Emily Drouet, 18, took the photo of the huge red mark on her cheek and sent it to a friend to document the abuse she was suffering at the hands of Angus Milligan.
He would slap her if he thought she had told a lie, encouraged her to sleep with other men and bought her bondage restraints for her 18th birthday.
Emily was found dead inside her halls of residence in Aberdeen in March 2016 after deciding she was unable to escape from her abusive relationship.
Milligan, 21, pleaded guilty last week to assault, threatening and abusing her using abusive and offensive language and sending offensive, indecent, obscene and menacing texts – he is due to be sentenced on July 5.
Emily’s parents, Fiona and Germain Drouet, say the photo is still the source of great upset for them, but they have decided to release it in the hope of helping other girls trapped in a similar situation.