What does it mean when the base of someone's nails are blue-tinged?

'Base' as in towards the palms, not toward the tips.What does it mean when the base of someone's nails are blue-tinged?
If you are cold your fingernails will go slightly blue, the colder you are the bluer they will go, but this is not a health problem. But in all seriousness if your fingernails are blue all the time, it can mean you have problems with your circulation, usually caused by heart disease.What does it mean when the base of someone's nails are blue-tinged?
It is very serious, It means that there isn't enough Oxygen in the Blood Stream.


Circulation isn't what it should be.





What are the conditons that made you ask this question?
Lack of Oxygen in the blood!?