causes for toe turning blue
If just the fingers, toes or limbs have turned blue and feel cold, it's known as peripheral cyanosis. Cyanosis that affects the skin generally and/or lips. When all the skin and/or lips have a blue tinge, it's known as central cyanosis and is usually a sign of low levels of oxygen in the blood. Common causes for central cyanosis are listed below. A problem with the lungs: