Why do we itch?

A mosquito bites you. Your grandma knits you a scratchy blanket. Your friend tickles you with a feathery cat toy. What do all of these things have in common? They make you itch! Listener Samantha was wondering just why that is, and neuroscientist Sonali Mali says she’s always wondered the same thing, so that’s why she studies it! Got a question tickling at your brain? Send it to us at BrainsOn.org/contact, because we’re just itching to help you find the answer!