Why does my girlfriend cut herself?

Self-harm is a complex issue, on the general term it's because of a "need" that gets satisfied only through that. It's not too different from an addiction, so start looking into reasons that make her want to despise herself or that harm her even more than cutting, it's usually one of these two.

It could be for a variety of reasons. Some people do it because they feel numb (almost like they are detached from the rest of the world) and they just need to feel something; almost as if to make sure they are still alive. Others do it for the opposite reason. They are overwhelmed with thoughts and emotions. Their minds are constantly going at 90mph and they have reached their breaking point and just want it to stop. The cutting offers temporary relief. There are other reasons, but these are the 2 most common as far as I know. Cutting is not a healthy coping mechanism and needs to be addressed. Try talking to your girlfriend about it. If she is not receptive, try talking to someone else you are close with.

Probably to cope with the pain inside of her. Physical pain helps some people to deal with their mental problems.

Look at her sitiuation, is she stressed out? Is there a bug change in her life? Is she dealing with anything? Don't point out her scars or make fun of her. It's going to make things worse for her and you. Try talking to her first and ask her if she's okay. Don't bother her about it because it may make her feel uncomfortable.

Maybe you should ask her. It's not my place to say anything for her as I do not know her at all, you should ask her if she's okay and let her know your supporting her every step of the way

She may be going through a lot right now. People hurt themselves because they feel it helps relieve their anxiety and sadness. Self harming may be something she is relying at this point in her life right now.

There are many reasons that people cut, including low self esteem or body image, insomnia, an ED, anxiety, depression, or even habit. I would suggest lightly bringing it up and communicatingly openly with her, as she's the only one who can really tell you

Your girlfriend might be going through a tough time try sitting her down and asking her what had been happening and be very supportive

It could be from a range of feelings, experiences, or emotions. Try asking her with gentle, open ended questions while stressing that you care. Coming across as judgmental (even if by accident) could cause her to shut down and not want to talk about it.

There are many reasons why someone may harm themselves. I'll list a few possible reasons. She might want to punish herself for perceived wrongdoings. She might feel numb and pain releases endorphins which cause her to feel something. On the other hand, she might struggle to cope with her emotions in a positive way, and the self harm may temporarily reduce the severity of her emotions. Thank you for supporting her. Feel free to chat with a listener to get some help for you. You deserve support too :-)