Ever Have Super Itchy Legs While Running? Blame Your Capillaries

Excited for the August 21 eclipse? Visit our Eclipse 2017 page to explore the science, history, and myths of the event. The Curiosity team will be viewing the eclipse alongside NASA in Carbondale, Illinois. Follow us on Facebook for live videos, trivia, and interviews on the big day.

Let's say you haven't gone for a run in a while (you're not alone), and decide to lace up and hit the pavement once again. You start your jog, but you only get about a block from your house when your legs start getting unbearably itchy. It's an all-over tingle that, fortunately, does not mean you're allergic to exercise. This extreme discomfort is basically your capillaries saying, "What are you making us do?!" Watch the video below to learn why this happens, as well as the painful way to cure the itch.

Why Do My Legs Itch When I Run?

Why Do I Have To Poop When I Run?

Why Do We Itch?

Share the knowledge!

Key Facts In This Video

  1. Itches, pain, and heat all follow the same neural pathways, but itches trigger special receptors called pruriceptors. 00:38

  2. Pruriceptors are attuned to touch as gentle as the pressure of a fly's legs. 01:12

  3. Itching activates more skin cells than the pruriceptors, which may be drowned out by these other signals or just turned off. 01:52

Why Do Peaches Make My Mouth Itch?

Share the knowledge!

If you liked this you'll love our podcast! Check it out on iTunes, Stitcher, Google Play Music, SoundCloud, search 'curiosity' on your favorite podcast app or add the RSS Feed URL.