I use to do it back in high school (2 years ago) I forgot why I started and why I stopped, but I did. I was rearranging my room a few weeks ago and I found it again (it’s a dull knife from my parents’ kitchen, I hid it cause my mum would come in to use my makeup and stuff). I couldn’t bring myself to get rid of it, so I just hid it again. A few days ago, I got stressed from everything (my grandmother passed, I’m failing uni even though I tell myself I love the work, etc) and started again. It helped cause I just stopped thinking for a while, until I realised what I did. I’m already planning on telling my therapist this, just needed to tell strangers to get it off my mind long enough to work again.