What is the definition or description of: self harm?

Damage to oneself: In brief, it is the action or inaction (failure to take action) that intentionally seeks to cause damage to oneself. Can range from mild physical harm, i.e. Scratching, to the extreme of causing death. An example of inaction would be not taking one's Insulin resulting in serious life threatening consequences.

Self harm: Self injury is the intentional direct injuring of body tissue most often done without clear suicidal intention, such as cutting/burning/scratching/hair pulling/banging/ingesting toxic substance or object.

NSSI: The technical term is non-suicidal self-injury and refers to any behavior or action that harms a person without the intention of ending one's life.