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There are many factors that can cause this. Mostly hardened blood vessels or thin walled blood vessels, usually paired with high blood pressure, sometimes a persons blood vessels can be thin enough where as much as a flick can cause them to rupture.

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13y ago
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16y ago

Probably weakness of the vein wall due to it being a varicose vein and/or something constricting the vein preventing the return flow of blood.

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14y ago

Well obviously if something goes in your hand and in your vein then it would burst and bleed.

Because that happened to my nose

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14y ago

Maybe because alot of blood was stuck in there so they burst.

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14y ago

If you wank too hard

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Q: What causes a vein to burst in finger?
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