How does ice (or any other extremely cold substance) numb an area?
In: Biology
Numbness is basically the inability for a signal to reach your brain.
One way of stopping the signal is to stop the cells from making it. Cells slow down and become less reactive when they are cold (as chemical reactions happen slower). This stops them from being able to send signals, leading to numbness.
Cold also causes blood flow to be reduced, which also stops cells from working.
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