Rumblood you shouldn't talk about things you don't know.
It is possible without breaking your hand/wrist. Noone says it doesn't hurt or you won't bleed or get a bruise or whatever, but you don't have to break your fingers, hand, whatever. It can happen, but doesn't have to.
Some people sometimes in their youth for example get the feeling or desire to hurt themselves, probably because they are drunk or something else in their life didn't work well and they are kinda stupid and think that would help.
In those moments people sometimes hit walls as hard as possible. Their hand doesn't have to break, yet it hurts alot, mostly next morning
But I suppose it depends on your condition. Doing no sport you might not hit very hard. Doing sport you might hit harder. Doing martial arts you might hit much harder, but your fists, wrists etc are used to hitting thus won't break that fast ;)
Sadly I have to say I did these weird things a couple of times when I was younger and it always hurt alot, sometimes more than a couple of days, but nothing broke
Anyway, to the topic: Hitting walls is a useless way to spend your freetime and it doesn't help at all. Find some other methods, people wrote many now.
I would suggest don't play another game or change your playstyle or whatever when you have these feelings/problems again. Turn off your pc, go out, enjoy the sun or whatever you love to do. You could also start playing an instrument, can be very nice