I am trying really hard to explain this thing that I’ve done since I was a kid. Sometimes out of the blue, I’ll get the urge to pull my arms in towards myself, tense my muscles, and let this really intense almost giddy feeling pulse through me. Like, I create that feeling. It comes up from my chest, into my throat and I occasionally let out a little involuntary squeal because of it. The sensation is not unlike when you’re silently screaming, but not angry. I feel more relaxed afterwards. My mood doesn’t seem to be related to when I do this. Sometimes it gives me a headache. 

The closest I’ve come to finding anything like that is discussions about stims in autism. I’m definitely not autistic though. Anyone know if this has a name?