ASMR

From Wikipedia:

Autonomous Sensory Meridian Response (ASMR)[2][3][4] is a tingling sensation that usually begins on the scalp and moves down the back of the neck and upper spine. A pleasant form of paresthesia,[5] it has been compared with auditory-tactile synesthesia[6][7] and may overlap with frisson.[8]

ASMR signifies the subjective experience of "low-grade euphoria" characterized by "a combination of positive feelings and a distinct static-like tingling sensation on the skin." It is most commonly triggered by specific auditory or visual stimuli, and less commonly by intentional attention control.[1][9] A genre of videos intended to induce ASMR has emerged, over 25 million of which had been published on YouTube by 2022 and a dedicated category of live ASMR streams on Twitch.