My brother self harms in your fashion. He punches himself in the face and has given himself black eyes.

I don't cut. I pinch myself until I bruise, snap bands on my wrists (the ones with the metal holding them together) until I leave big welts, and sometimes rake my nails down my bare legs. ---Sigh.

DBT is not gears towards stopping self injury, but it may be worth at least looking in to. There is a free class offered by Yahoo at http://health.groups.yahoo.com/group/dbtclass/
and they also have a chat here on Saturday mornings.