Over the past few years, YouTube has exploded with videos aimed at making viewers feel relaxed, tingly, and even sleepy — a sensation known as autonomous sensory meridian response (ASMR). Within the ...

If you’ve ever experienced a tingling sensation on your skin in response to a certain visual or sound, you may have had an autonomous sensory meridian response—or ASMR as it’s more commonly known as.

Maybe you've seen one of the millions of videos devoted to ASMR on the internet, or perhaps you experience the brain tingles yourself. Here's what you need to know about the phenomenon, adapted from ...