ELi5: Why do certain sensations like chalk on a chalkboard or rubbing styrofoam together cause your skin to crawl?

Question

ELi5: Why do certain sensations like chalk on a chalkboard or rubbing styrofoam together cause your skin to crawl?

In: Other

Answer 1

Scraping your teeth on a dry tongue depressor (or wooden ice cream “spoon”). Shuts me down for a second.