I've had a similar sensation to ASMR when I was easing off various SSRIs, which seems to be most commonly known as brain zaps. unlike ASMR however, it's not always pleasurable. I find brain zaps feel higher in the head, too.

basically the SSRI withdrawal made it so that every time I moved my eyes, there was an unpredictable chance of jolting myself. I know some people enjoy brain zaps and intentionally trigger them, but my experience has been more akin to a slow torture.