Tears due to crying from sadness have a natural painkiller called Leucine Enkephalin in them which are not found in tears when crying for happiness or when our eyes water.
Source: wikipedia.org
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Stethoscope Invention
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Tears due to crying from sadness have a natural painkiller called Leucine Enkephalin in them which are not found in tears when crying for happiness or when our eyes water.
Source: wikipedia.org
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