Teuila Blakely says she has been kicked in the head and dragged down the hallway by her hair by abusive ex-partners.
The Dancing With the Stars competitor says she was battered so badly in one attack her jaw remains out of alignment.
She said her injury serves as "a constant reminder of one of the lowest points of my life".
Blakely, whose chosen charity on DWTS is Woman's Refuge, reveals her struggles with domestic abuse for the first time in this week's edition of Woman's Day.
The 40-year-old says she grew up surrounded by violence, so being treated badly by partners seemed "normal".