ASMR stands for Autonomous Sensory Meridian Response. It is a pleasant, relaxing tingling sensation that typically starts on the scalp and moves down the back of the neck and upper spine. This sensation is often described as "tingles" and is triggered by specific auditory or visual stimuli such as whispering, tapping, slow movements, or personal attention

. ASMR is considered a form of paresthesia (a tingling feeling on the skin) and is associated with feelings of relaxation, calmness, and sometimes a mild euphoria. It is commonly used to reduce anxiety, help with sleep, and improve concentration

. The term was coined in 2010 by Jennifer Allen to provide a neutral, clinical name for the sensation, avoiding earlier associations with sexual arousal. The word "meridian" was chosen to signify a peak or point of highest development, reflecting the sensation's intensity

. In summary, ASMR is a sensory phenomenon characterized by a soothing tingling sensation and positive emotional response triggered by specific stimuli, often used for relaxation and stress relief.