In the DSM5 (the next version of the DSM) they are considering adding a new disorder called Non-Suicidal Self Injury. You can see the proposed diagnostic criteria here: http://www.dsm5.org/proposedrevision...n.aspx?rid=443

They are adding it because right now self injury is only a symptom of BPD. But it is recognized in the field as being a behavior that is used by people who do not have BPD.