Blue nails may indicate that the blood is not carrying enough oxygen to the fingertips. There are many possible causes, including heart and lung diseases. Anyone with blue nails should seek medical ...

The woman had the classic signs and symptoms of Raynaud phenomenon. In the absence of a related systemic disease, this condition is termed Raynaud disease, or primary Raynaud phenomenon. In 1862, ...

Achenbach syndrome is a rare, benign condition that involves swollen and bruised-looking (or “blue”) fingers and toes. It is not connected to other health conditions but may mimic their symptoms.