What is caused by poorly oxygenated blood in the dermis?

Cyanotic skin.

Cyanosis is a bluish or purplish discoloration of the skin and mucous membranes that is caused by poorly oxygenated blood. It can be a sign of a number of underlying medical conditions, including:

* Heart disease: Cyanotic heart defects are birth defects that affect the structure of the heart and prevent oxygen-rich blood from being pumped to the body.

* Lung disease: Chronic obstructive pulmonary disease (COPD), asthma, and pneumonia are all lung diseases that can cause cyanosis.

* Methemoglobinemia: This is a rare blood disorder in which the hemoglobin in the blood is unable to carry oxygen properly.

* Carbon monoxide poisoning: Carbon monoxide is a gas that can bind to hemoglobin and prevent it from carrying oxygen.

* Hypothermia: This is a condition in which the body temperature drops too low.

Cyanosis can be a serious medical condition, so it is important to see a doctor right away if you experience any bluish or purplish discoloration of your skin or mucous membranes.