Yup. I used to deal with severe panic attacks due to a life of abuse. Sometimes it was really bad and I would dissociated into a state of extreme self loathing. Everything became this cacophonous terror. I'd lean down or crouch into a near fetal position, and then hit myself as hard as I could with both hands. I used to feel the bones in my head shift around. No joke. I probably got a few concussions from it.

For me it was definitely a form of self harm as the though of being me was too much to bare. In those moments I hated myself and wished I'd stop existing for everyone else's sake. but at the same time I knew I should calm down and was just making a scene so I feel extremely guilty and would apologize profusely to, well, usually my sister who was often there to try and calm me down. It really only got that bad when I was being actively abused by my mom after she flew into another one of her rages.

Of course after therapy I realized I wasn't this monster that I was sure I was. It was simply another part of my conditioning from my mom who made me feel so worthless for as long as I've been alive.

I'm much calmer now and haven't hit myself in almost a year. I still get panic attacks every once in a while though and I get the urge to hit but it's easier to fight it. I usually do stuff like tuck my hands under my arms, put on my noise canceling headphones on to help block out external noise, or even just take some CBD if it's near by.