An adolescent has described how she felt "like a caged animal" during her four-year stay at a mental health hospital.
Faith Wilthew, now 18, was admitted to the West Lane Hospital in Middlesbrough at the age of 14.
She says she was told that it was her "own choice" to get herself wrong and that the staff did not offer any support when she showed the worrying signs.
Her mother, Kelly, also described how in a visit to Faith, she saw blood on the walls, before the staff supposedly said it was "her choice" to be repeatedly struck against them.
Twenty members of the staff have been suspended from the mental health center for claims that use "unapproved" techniques to move patients, informs the BBC.
The Dependency Care Quality Commission is monitoring an investigation in the hospital after the concerns raised in November that the staff was moving patients in "not taught and not in accordance with the trust policy ".
Faith continued explaining how sometimes he got up from a bed by his feet and hands before dropping him to the ground and staying to sleep.
She said: "I felt like a caged animal. Most of the time I felt like I was imprisoned. I went there at age 14 with a scar from my body and I left at 18 scars.
"They told me it was my own choice if I wanted to spoil.
"Sometimes I got up from my bed by the hands and feet and they simply lower me to the floor and stop me. Things have to change."
Faith's mother, Kelly, fought to get her daughter back home after separation.
Kelly described how in a visit to Faith, he noticed that the blood covered the walls after presumed presumed sentences of Faith to strike his head against him for three days.
The worried mother said: "At one point he started to hit his head against the wall.
"She did it for about 72 hours and told her that it was her choice if I wanted to continue doing that.
"When I came to see her, there was still blood on the wall."
Elizabeth Moody, Tees, Esk and Wear Valley, nursing director at the NHS Foundation Foundation, said: "The care and safety of all our service users is our first priority and we hope that our staff will show respect for your dignity and well-being.
"We take any accusation that could be suggested in a very serious way.
"Our staffing levels are reviewed twice daily by the senior clinical leaders to ensure the quality of care provided to young people at all times."