self abuse
(2) Any act of intentional physical injury to oneself. Such acts involve bruising, scratching, cutting, burning, etc. People may practice self abuse to relieve emotional pain, which may be associated with a serotonin imbalance, which (speculatively) self abuse might be relieving through an indirect neurotransmitter mechanism
Management Psychotherapy, SSRIs (selective serotonin reuptake inhibitors)