There are no fixed rules about why people self-harm. For some people, it can be linked to specific experiences and be a way of dealing with something that is happening now or that happened in the past.
Some people don’t understand the reasons for self-harming and that's OK. You don’t need to know this in order to ask for help.
Difficult experiences can cause someone to self harm. Common causes include:
Visit Childline or the NHS website for help and advice if you or someone you know is self-harming.