Self-harm is an umbrella term for any harmful behaviour, action or habit. Self-harm includes a range of things, including overeating, taking drugs, smoking and drinking too much alcohol. This could be deliberate, because you are depressed or anxious, or as a way of punishing yourself for something you have done. When a person causes physical injury to themselves the term self-injury is used. It could be cutting, burning, pulling hair, picking skin or taking an overdose.