I stumbled across something the other day that made me sit up because it seemed to perfectly describe a feeling I experience from time to time that apparently isn't uncommon.
It's called Autonomous Sensory Meridian Response or "ASMR" and is a kind of tingly feeling on/in your head. You can read about it here:
I always kind of liked when it happened but never knew what it was or what triggered it (but have since been paying more attention and have a better idea). It turns out there are people who really chase this thing and there is an ASMR reddit site and numerous people who make videos to trigger it in others. It's huge - some of the videos have many millions of views.
Anyone else here ever experience it?