My mom saw my SH when I was about 13. She was devastated and put me in therapy right away. She used to check my wrists so I would self harm other places to not be seen. My friends self harmed too but they worried for me bc I was more severe (cutting all day, even cutting at school).
I guess it depends on your family/friends. Mine overall worried and still do. I'm 24 now and relapsed a few months ago after 5 years clean, but I am now about 3 months clean. If you haven't started, please don't. You don't have to listen to me, but I cut for about 8 years consistently and it really becomes an addiction and even when I was clean for 5 years, I thought of it every day all day long. But again, totally your choice. I know how it feels to hate yourself and need some type of release.