Blue-purple skin changes

If the reduction of hemoglobin in the blood (a type of hemoglobin that does not carry oxygen) increases, the skin will have a bluish-purple change in the skin, which is medically called a cyanosis, which is often most pronounced on the tongue, lips, auricles, cheeks, and extremities. Blue-purple skin changes are more common in platelet purpura, which is a kind of blood that is not easy to coagulate and blood diseases due to fewer platelets.