Name of the Day. FIONNUALA. Previous. Means white shoulder from Irish fionn white, fair and guala shoulder. In Irish legend Fionnuala was one of the four children of Lir who were transformed into swans for a period of 900 years. more...
Causes of Blue nails (Blue toenails or fingernails). The list of medical condition causes of Blue nails (Blue toenails or fingernails) includes: 1  Agyria. 2  Mepacrine. 3  Lack of oxygen.
When oxygen levels in blood are reduced, the blood's color darkens. This produces the purple tinge in fingernails if the blood there does not contain enough oxygen. Apart from poor circulation and smoking, lack of oxygen in the blood can also be caused by anemia.