Why do cold fingertips hurt more than warm ones when you are working with them?

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Why do cold fingertips hurt more than warm ones when you are working with them?

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Since the cold ones are more rigid, and therefor alerting more nerves about a problem. In short.

Cold fingertips are more rigid and therefore harder to cut off, which may result in you cutting yourself accidentally. This is why you should always work with fingertips that are still warm.