Defined as a "calming, pleasurable feeling often accompanied by a tingling sensation", ASMR occurs in response to certain stimuli and has also been likened to a 'head orgasm'.
The stimuli that trigger ASMR vary from person to person, but some of the most common ones are said to include whispers, white noise, lip smacking, tapping on hard surfaces, brushing sounds and even the sound of someone eating.
The whole point of ASMR is to relax people, and believe it or not, it's big business, especially on the internet.
