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.
ASMR doesn’t work for everyone and it can be tough to imagine the sensation if you don’t experience it first-hand. For most people who do experience it, the blissful tingling starts up in the scalp and then makes its way through the body to the arms and legs. And as a result, it can trigger a feeling of relaxation before bedtime, which can help you overcome insomnia. The audio/video segments are long—in fact, some last up to an hour. They are lengthy so that you can keep watching or listening to them until you drift off.
Many of those who experience ASMR report that some specific non-vocal ambient noises are also effective triggers of ASMR, including those like the sound of rain, fingers scratching or tapping a surface, the crushing of eggshells, the crinkling and crumpling of a flexible material such as paper, or writing. Many YouTube videos that are intended to trigger ASMR responses capture a single person performing these actions and the sounds that result.