Scratching oneself is a disguised release. Because of unspeakable pain, because of irrepressible sadness, you need to release yourself.
In many film and television literature, scratches are often used as an abnormal release and catharsis, which can also be understood as dumping and dissolution. Therefore, when all kinds of negative emotions hit the child, the child chose to use a knife to scratch himself.
Because she didn't want to destroy her good image among her classmates, parents, and teachers, she chose such an extreme way to release herself. It may be that there is no one to talk to, or it may be that confiding is seen as a form of humiliation, and adolescent children often lack the right means to relieve stress.
Here, I strongly advocate and loudly appeal to parents to strive to listen to their children's voices, no matter how difficult things to tell, they need correct and scientific means to solve them.
Know how to understand your child and don't use strong words to exclude their expression. Maybe they secretly liked their tablemates, or maybe they "messed up" an exam. But what are these compared to a child's life?
Don't wait until you lose to regret it. When children have negative emotions such as sadness, distress, irritability, depression, etc., as parents, you should encourage and care for them, instead of blindly blaming. Because accusations have no effect, emotions are real, and they don't disappear because of your accusations, but they can be exacerbated.
Psychological illnesses are similar to physical illnesses such as fever, cold, and diarrhea, but they are more harmful. This is because many parents often do not pay enough attention, and hospitals and schools in many places lack the facilities they are equipped with.
Children who scratch themselves are often children who lack a sense of presence. For many left-behind children, the lack of presence has been a pain in their daily lives.