I’m glad that it’s at least showing up for you occasionally. It certainly seems to affect people differently and it’s an incredibly strange, though wonderful, phenomenon. I don’t pretend to understand it fully myself, and haven’t done research on it other than to check if it’s harmful, which from what I’ve seen doesn’t seem to be an issue. My reactions seem to have gotten more intense lately, sometimes to the point of having to pause the video for a short while in order to calm it down a bit.
As ASMR has started to come to mainstream attention, researchers have finally begun trying to answer that question. Neuroscientists are now experimenting with fMRIs and electroencephalography to see if the brains of “tingleheads,” as they are called, are any different than those who don’t tremble at the sight of napkin-folding. They’ve also surveyed tens of thousands of people who say they experience the phenomenon. So far there are intriguing—if limited—findings suggesting that ASMR may relieve some people’s symptoms of stress and insomnia, and that the brains of those who experience it may be organized a little differently.
Last year, Rooster Teeth released the documentary "The World's Greatest Head Massage: An ASMR Journey," where filmmakers traveled to Pushkar, India to find Baba the Cosmic Barber. Unbeknownst to Baba, he had become a YouTube sensation after people had been uploading videos of his "cosmic energy" shaves and head massage techniques. Baba has since created his own YouTube channel, ASMR Barber, to take advantage of his popularity.
ASMR is usually precipitated by stimuli referred to as 'triggers'. ASMR triggers, which are most commonly auditory and visual, may be encountered through the interpersonal interactions of daily life. Additionally, ASMR is often triggered by exposure to specific audio and video. Such media may be specially made with the specific purpose of triggering ASMR or originally created for other purposes and later discovered to be effective as a trigger of the experience.