"According to the National Children’s Alliance, in 2013, nearly 679,000 children were victims of abuse and neglect.” (causes).
Confirmation - Research
“For instance, a child who is physically abused suffers first from the bodily injuries of the abuse, which can include bruises or broken bones. When these injuries heal, however, psychological or emotional scarring may remain. These children may become fearful and mistrustful of everyone and grow up feeling isolated and abandoned.” (effects , physical).
"The physical, psychological, or sexual abuse of children usually results from the presence of multiple specific risk factors within a family. Additionally, the child’s older family members, not strangers, usually carry out most child abuse." (effects - mental).
That is enough kids to fill up over 680,000 public schools in America. :(
These sentences basically describe why people who have been abused have trust issues or other problems.
Some people who read the last sentence here become very careful around their family members because domestic violence is a horrible thing to go through.