Self Harm: Why Do Teenagers Do It? - Newsnight

The number of teenagers self-harming - cutting or poisoning themselves - is increasing at a startling rate according to new figures prepared for the World Health Organisation. Tanya Byron is a clinical psychologist and author of the Skeleton Cupboard. Kat Cormack works with Young Minds, a charity that intervenes to improve the mental health and well-being of young people. She herself self-harmed between the ages of 14 and 21.