There are many easier, les painful and less degrading ways of attracting it. It's a Borderline Personality Disorder. Self injury is NOT a diagnosis. What is true for one person is not necessarily true for another. Commonly, self injury is dialogue with yourself, an expression of inexpressible emotion, or an absence of self-value.
Self harm is a private activity.
It's not about its effect on others. Self-harmers are usually hysterical women under thirty who grow out of it. Traditionally this has been the asusmption. Recent research shows the difference in rate of self injury in men and women is less marked. How severe staff think the wound is won't tell them how bad the person feels.