ASMR stands for Autonomous Sensory Meridian Response, a nonclinical term coined in 2010 by Jennifer Allen, who’s been involved in online organizing around ASMR since the late aughts. Allen, who works in cybersecurity, figured people couldn’t discuss the phenomenon unless it had a name—ideally, an official-sounding one, to lend legitimacy to a practice that can be embarrassing to share. Once ASMR had a name—and had been featured in a slew of can-you-believe-this news stories—academics became interested in pinning down what it was.
The study is still ongoing, and results have not yet been published. But for his part, Richard has been developing a theory of what ASMR is and why it exists. His theory isn't exactly scientific, but it is beautiful: He notes that the quality that underlies almost all ASMR videos is what’s been called a “tranquil, womb-like intimacy.” That is, ASMRtists speak softly into the ears of headphone-wearing viewers, gently coaxing them to sleep by way of assiduous personal attention, comforting words, smiles and simulated stroking. At its most essential level, Richard believes, all the intimacy channeled through towel foldings and whispered affection is about triggering the felt experience of being loved.    
While the Ephemeral Rift YouTube channel features conventional relaxing videos like trees rusting in the wind or someone shuffling wooden blocks, Paul also experiments by playing characters like Dr. Lampert Schade, a psychiatrist with a lampshade on his head, and Corvus Clemmons, a plague doctor who wears a bird-like steampunk mask. All the videos feature soft soothing sounds and no sudden movements.
As Drenge put it to us, “the online slime craze popularized through Instagram and YouTube has touched on something deep within us.” According to the hypothesis that they tested with the video itself, “short, attention-sapping clips of Technicolor liquids reacting to a variety of stress tests tickle the base nerves of the brain. MRI scans show activity in the same parts of the brain that react to hypnotism and childhood comforts, brought on by warm blankets and lullabies. Scientists are reluctant to reveal any secrets but rumours are swirling with regards to an obscure cortex known as Deep Baby Brain. We are beginning to unlock deep secrets about the human psyche.”

If you watch ASMR slime videos (or just any old ASMR videos) to go to sleep, Winter says there's no reason why you should stop. “It’s the 2017 version of counting sheep,” he says. “If you feel like it’s enhancing your ability to fall asleep, that’s great.” However, if you find that you struggle to go to sleep without watching an ASMR video, he recommends taking a break from videos every now and then and mentally conjuring up the image of someone massaging slime or having their hair brushed. That, too, should help kick you into relaxation mode and help you catch some zzzs.
The burgeoning Internet phenomenon was so new, it didn’t even have a name. It was so strange and hard to describe that many people felt creepy trying. It resided at the outer edge of respectability: a growing collection of YouTube videos featuring people doing quiet, methodical activities like whispering, turning magazine pages and tapping their fingers. Some viewers reported that these videos could elicit the most pleasurable sensations: a tingling feeling at the scalp and spine, coupled with euphoria and an almost trance-like relaxation.

The French word 'frisson' signifies a brief sensation usually reported as pleasurable and often expressed as an overwhelming emotional response to stimuli, such as a piece of music. Frisson often occurs simultaneously with piloerection, colloquially known as 'goosebumps', by which tiny muscles called arrector pili contract, causing body hair, particularly that on the limbs and back of the neck, to erect or 'stand on end'.[54][55][56][57]
There is no solid data about ASMR, no published research studies — not yet. The term “ASMR” is nonclinical, coined in 2010 by a woman named Jennifer Allen who started an ASMR Facebook group and later became part of a team — along with Richard — that collected and analyzed anecdotal information about the sensation. Richard also notes the work of Bryson Lochte, a Dartmouth College undergrad who has used neuroimaging technology to study ASMR for his senior thesis but has not published his results.

1. Do you have different reactions depending on who is the source of the sound? For example, I have very distinctive reactions, i.e. if someone from my relatives does the mouth sounds, I get irritated and at times even angry. I even leave the kitchen if I hear my relatives making the sounds while eating. Purely biological, can’t explain it. The sounds are unpleasant for me. But if a random person or someone I barely know from an opposite sex does the mouth sounds, I can get ASMR or pleasurable feelings.
I am a bit curious since I did not seem to have ASMR. I never experienced it in my life but I started listening to ASMR early 2016 with no other reason other than how relaxing it was. But after what must have been at least 6 months I felt what most people describe as the head tingles. I did not experience this feeling again for about another month or two but then I started to get the head tingles at what seems like random times. Some times it is once a week, other times it is once a month. It is still rare but it seems to happen more than initially. I mainly listen to personal attention asmr, tapping, or reiki asmr but no single one regularly triggers it. Am I just getting a “pins and needles” feeling or is this asmr? It is very short and very random if I feel it or not. Not a single “trigger test” I have found has triggered this. Anyone with a similar experience or a possible explanation? The only things I can come up with is that I started cognitively simulating it, It is just pins and needles but the asmr is just relaxing so it feels nice, or a gene was activated due to my repeated listening and research into the topic.
In addition to the information collected from the 475 subjects who participated in the scientific investigation conducted by Nick Davies and Emma Barratt,[4] there have been two attempts to collate statistical data pertaining to the demographics, personal history, clinical conditions, and subjective experience of those who report susceptibility to ASMR.
The website for ASMRtist United looks remarkably like it was created by a child – which it was. Founded in August 2017 by 14-year-old Jacob Daniel, the “company” offers advice to ASMRtists under the age of 18. There is a guide on how to filter sexual comments, advice on coping with cyberbullying and a post entitled “How do I stop my school from finding my channel?”.
So. I found out about this roughly… an hour ago. And holy… what an hour it’s been. I didn’t even know I could feel this type of stuff (although for most it seems to be in their head/scalp/neck etc, for me, it’s in my chest.). My biggest trigger seem to be taps… from the crisp tap to a low thump. One thing I am noticing though, is how many girls do the videos (I can understand this, as a female voice generally has a more relaxing effect.) but I was wondering how many people prefer a male voice? Any preference to accents, etc.
The first study to perform actual brain imaging (fMRI) on subjects currently experiencing ASMR tingles (as opposed to individuals who were merely able to experience the phenomenon) was published in BioImpacts in September 2018. Subjects viewed several ASMR videos with a screen and headphones while inside the MRI scanner. The study found a significant difference in brain activation between time periods when the subject reported tingling (communicated by pressing a button), as compared to time periods when they were watching a video but not reporting tingling (communicated by pressing a different button, to control for brain activation effects caused by merely pressing a button). They concluded that "the brain regions found most active during the tingling sensations were the nucleus accumbens, mPFC, insula and secondary somatosensory cortex", and suggested that these were similar to "activation of brain regions previously observed during experiences like social bonding and musical frisson".[29]
You have no idea how happy I was when I found out what ASMR was. I have had the trigger since I was a child and just like this says, I never understood what it was but I liked it. But sometimes bothering me. Like, if I need to focus in school while a teacher is trying to help me, but the sound of them flipping the pages in a book makes me sleepy and lose focus. And when I haven’t had enough sleep I seem to get the trigger from almost everything…
I just discovered I was capable of triggering tingles on purpose this past month, after it popped into my head one day to seek out a video of a cat grooming itself (my trigger) to see if I could purposely trigger that weird relaxing feeling that I had experienced occasionally growing up, but had never really fully thought about. So that was pleasant. Then oddly enough a week ago I attempted to articulate this experience to a friend at a party (not knowing the term ASMR – nor even aware that it was a known thing, I simply described it as this peaceful, totally non-sexual, relaxed feeling I get from watching cats grooming themselves). Against all odds, this friend said, “oh, you’re probably experiencing ASMR – you should look it up.” Needless to say – it’s nice to find that indeed there’s an entire community of people online that have the same capability. Thought I’d share my experience and ask a couple questions.
ASMR is usually precipitated by stimuli referred to as 'triggers'.[11] 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.[4]