Autonomous sensory meridian response-is a euphoric experience characterized by a static-like or tingling sensation on the skin that typically begins on the scalp and moves down the back of the neck and upper spine.
There's a name for it!!! ASMR - Autonomous Sensory Meridian Response. That blissed out, super-relaxed feeling that literally makes your scalp tingle! One of my triggers is the sound of certain vacuum cleaners. When I worked evenings in an office, the cleaning crew would come in and switch on a vacuum. I could barely keep my eyes open!
Autonomous sensory meridian response - Wikipedia, the free encyclopedia