>>136491
Endorphins and adrenaline I think. It all started when I was working in a warehouse while feeling really depressed. One day I accidentally cut my arm with a boxcutter and afterwards, I felt perky. I thought "wow, this must be why people cut themselves" and since I had been contemplating suicide for some time at that point anyway, I didn't really give a fuck anymore, so I would just go to the bathroom and slash my thighs and chest so I could feel better.

I also have BPD and sometimes I just lose the ability to control my emotions and have retard-esque tantrums because of that. Usually just smashing things, biting and hitting myself, but sometimes cutting myself also.