what are causes of cyanosis
Causes of peripheral cyanosis. 1  All causes of central cyanosis cause peripheral cyanosis. 2  Reduced cardiac output-eg, heart failure, shock. 3  Peripheral arterial disease-eg, thrombosis, atheroma or embolism. 4  Vasoconstriction: 5  Cold exposure. 6  Raynaud's phenomenon.
There are two main categories of cyanosis: central and peripheral. Central cyanosis causes a bluish colour in the lips, tongue, and skin, especially the fingers and toes. Peripheral cyanosis is seen only in the fingers and toes. Cyanosis caused by congenital heart conditions is often seen soon after birth, but sometimes it does not appear until a baby is older.