Scratching an Itch: Why It Feels So Good Yet Carries Social Stigma
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We derive pleasure from scratching itches, but may have evolved to avoid/shun those who scratch as it could signal contagion.
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Seeing others scratch can trigger contagious itching, especially in those with skin conditions like eczema.
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Mammals instinctively avoid others that scratch, possibly an evolutionary adaptation to avoid catching parasites/infection.
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Chronic itch sufferers often feel shame and stigma, exacerbated by stress, continuing an itch-anxiety cycle.
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Scratching itches releases neurotransmitters that provide pleasure and distraction from the itch sensation.