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By Mayo Clinic staffThere's no one single or simple cause of self-injury. The mix of emotions that triggers self-injury is complex. In general, self-injury is usually the result of an inability to cope in healthy ways with deep psychological pain. For instance, you may have a hard time regulating, expressing or understanding your emotions. Physical injury distracts you from these painful emotions or helps you feel a sense of control over an otherwise uncontrollable situation.
When you feel emotionally empty, self-injury is a way to feel something, anything, even if it's physical pain. It also offers an external way to express internal distress and despair. You may also turn to self-injury as a way to punish yourself for perceived faults. Sometimes self-injury is an attempt to seek attention or to manipulate others.