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Your thumbs go numb because blood is having trouble circulating to your extremities. That's why frost bite kills your outer most parts, it's because there is not enough or no oxygen reaching the parts of your body that needs it.

This can also be a sign of Reynauds Syndrom. Not a serious condition, but it has to do with cold messing around with the nerves that control the capillaries. Once warmed up, circulation returns.

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13y ago
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9y ago

If there was no previous injury to that thumb then you most likely have a pinched nerve in your back, shoulder, or neck. Having a pinched nerve can cause this symptom and you should seek medical attention.

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15y ago

Because Tical plays too many dumb Video Games.

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12y ago

aaa bbb ccc

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Q: Why do your thumbs go numb when you are cold?
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