Is it normal to do this?

Everytime i think about a specific thing (it's something that fucks me up really badly if i let it get to me or if i think about it for too long), almost as an immediate reaction, i always bang my head against the nearest surface/wall or even hit myself on the head with my hand/fist (and i am not gentle at all, i hit kinda hard). It's my first reaction and it comes out without me being able to control it. I just do it. I think it's because my brain just wants me to punish myself for thinking about it but idk.
Is it normal to do that? Do u hit yourself involuntarily too?