Noticing your hands or fingers turning bluish in colour can be quite unsettling. This condition, known as peripheral cyanosis, occurs when oxygen-rich blood doesn’t reach your hands and feet ...

ATLANTA — The list of COVID-19 symptoms grew over the last two years of the pandemic. Health officials altered the symptoms on that list depending on the prevalent variant of the time. The top ...

If you have blue (or purple) fingernails, it’s often a sign that your blood is low in oxygen. Low oxygen, called cyanosis, may be due to numerous lung, heart, blood vessel, and blood cell disorders.