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.
Quick Answer. The main cause of a purple tinge in fingernails is low oxygen levels in the blood. This can be caused by poor circulation, as well as habits that inhibit oxygen absorption such as smoking. A single fingernail may also become purple if it has been injured, indicating a bruise underneath the nail.