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Old 09-12-2008, 05:38 PM   #1
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justalilpink HB User
nail black when crushed

why does your nail become black when it is crushed?

 
Old 10-08-2008, 01:17 PM   #2
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Re: nail black when crushed

Basically because the crush injury causes bleeding under the nailbed. You are seeing the old dried blood through the fingernail since fingernails are translucent. If too much blood builds up before the injury stops bleeding, a hole literally needs to be made in the nail itself to relieve the pressure, otherwise it is agonizing.

 
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