TENS Units for T-v-N-S Transcutaneous Vagus Nerve Stimulation

The tragus and concha, these are areas on your ear. When those muscles are tense, it sends the message through the trigeminal nerve to the vagus nerve that there's stress out here. Just just hard enough to move the skin stimulates a positive sensation. Some people, it actually can trigger ASMR by rubbing right here because you're hearing that rubbing sensation.