This includes neglect. Most child abuse comes from selfish parents. When a child is neglected or rejected, damage is done to them emotionally, mentally and physically. Emotionally these children are unsure of themselves, and everyone or almost everyone around them. Often they are unable to be still or concentrate.
Emotions are always at an extreme pitch.
Mentally they cannot trust others or themselves. They have difficulty learning due mainly to being emotionally unsound. Some become so fearful they are always watching everyone around them. Some are pressured so by rejection, they go to unnatural or extreme means to succeed. Lying does not seem so bad if it will stop the abuse.