Cyanosis

Cyanosis – bluish discoloration of the skin and mucous membranes. It occurs when there is an increase in reduced hemoglobin in the blood. Cyanosis is caused by respiratory failure, heart diseases, poisoning with nitrates, sulfonamides, aniline, congenital heart diseases, congenital pathological forms of hemoglobin. It is more visible where the skin is thin and blood circulation is slowed down (on the face, tip of the nose, lips, earlobes, fingertips, nails).

Source | Author Doctor Nikas Samuolis, reviewed by Prof. Virginijus Šapoka | Vilnius University | Faculty of Medicine | Head of the Department of Internal Medicine, Family Medicine, and Oncology