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Old 01-31-2014, 10:13 PM
 
Location: Michigan
29,391 posts, read 55,457,668 times
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The sensation of feeling itchy is pretty universal, and yet scientists still don't completely understand the complex processes that give us the urge to scratch.

Itching can be annoying, but like pain, a little bit can be a good thing. Itching can help people learn to avoid dangers such as mosquitoes carrying malaria, or poison ivy. But many people suffer from chronic itch, which has no direct cause and can be a debilitating condition with few options for relief.

Why do we itch? Scientists seek to solve the maddening mystery | Fox News
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Old 02-01-2014, 01:03 PM
 
Location: Windham County, VT
10,855 posts, read 6,344,105 times
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There was a great article in The New Yorker magazine a few years ago about this, which I read with fascination:
Scratching an itch through the scalp to the brain : The New Yorker
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