Itch used to be understood as a mild form of pain, but scientists are learning this sense is more than just skin deep. How deep does it go?For show transcripts, go to vox.com/unxtranscriptsFor more, go to vox.com/unexplainableAnd please email us! unexplainable@vox.comWe read every email.Support Unexplainable by making a financial contribution to Vox: vox.com/givepodcastsPlease take a second to help us learn more about you! vox.com/podcastsurveyLearn more about your ad choices. Visit podcastchoices.com/adchoices