If and only if it’s negatively self reinforcing. Which it might not be, if it’s serving some purpose.
Self-harm can help you to feel in control, and reduce uncomfortable feelings of tension and distress. If you feel guilty, it can be a way of punishing yourself and relieving your guilt. Either way, it can become a ‘quick fix’ for feeling bad.
Every time you do it, you condition yourself against doing it.
If and only if it’s negatively self reinforcing. Which it might not be, if it’s serving some purpose.
-- http://www.rcpsych.ac.uk/mentalhealthinfo/problems/depression/self-harm.aspx