The girl probably experienced some setbacks when she was young, so that when she grew up, she fell back to her original state as soon as she encountered problems.
Get pleasure by hurting others; So as not to get hurt; At the same time, it is also using this extreme way to test everyone's love and acceptance of her. Because her heart itself is bloody, and the wound has not healed.
Suggest psychological counseling to correct bad behavior in time so as not to affect social function.