Well, the actual nail is always dead, just like your hair. The blue comes from something like a bruise in the skin underneath the nail.
After death, blood circulation stops, causing blood to pool in the capillaries under the fingernails. This pooling of deoxygenated blood can give the fingernails a bluish appearance due to lack of oxygen.
If I were you, I would check my drinking water for nitrates. They are responsible for "blue baby syndrome", where skin turns blue, but I don't know about fingernails. nail polish tehe Family Feud answers: nail polish, cold, dead, bruised
blue fingernails
Blue fingernails should look fungi infection
Betacarotene found in fruits and vegetables can cause fingernails to turn orange when taken in high quantities.
dirt
It's you dead, hsrden skin!
Basically, when you're dead.
Yes. As is hair and the outer layer of the skin.
dead cells
so that we don't eat the germs which we touch along with our food and get sick. and fingernails are made up of dead skin
Sucking my dick