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.

“It’s a physical sensation that begins in the scalp and extends through the body,” says the creator of popular ASMR videos. No time to get a stress-relieving massage in real life? For some people, ...

The euphoric-but-relaxing responses to soothing visuals and quirky, textural sounds has spawned an online wellbeing phenomenon. But what is ASMR—and why do only some people feel it? Increasingly, ...