@nbcnightlynews
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NBC Nightly News | Why Scratching an Itch Really Does Make You Itch More @nbcnightlynews | Uploaded October 2014 | Updated October 2024, 7 hours ago.
Researchers at the Washington University School of Medicine say the minor pain of scratching an itch produces serotonin, the "pleasure" hormone.
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Why Scratching an Itch Really Does Make You Itch More @nbcnightlynews

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