Blue fingernails | Symptom Checker
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What causes blue fingernails? 29 possible conditions

See a list of possible causes in order from the most common to the least.

1

Blue fingernails

Blue fingernails may represent a type of cyanosis caused by a lower level of lack of circulating oxygen in the red blood cells. It may also represent a high level of an abnormal form of hemoglobin in the circulation.

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2

Emphysema

Smoking is the leading cause of emphysema, a disease of the lungs that makes it hard to breathe. Learn more about how emphysema affects you and how it's treated.

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3

Peripheral Vascular Disease

Peripheral vascular disease (PVD) is a circulation disorder that affects blood vessels outside of the heart and brain, often those that supply the arms and legs.

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4

Pulmonary Embolism

This condition is considered a medical emergency. Urgent care may be required.

A pulmonary embolism is a blood clot that occurs in the lungs. It can damage part of the lung and other organs and decrease oxygen levels in the blood.

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5

Carbon Monoxide Poisoning

This condition is considered a medical emergency. Urgent care may be required.

Learn about carbon monoxide poisoning and what causes it. Find information on carbon monoxide symptoms, diagnosis, treatment, and prevention.

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6

Arterial Embolism

This condition is considered a medical emergency. Urgent care may be required.

An arterial embolism is a blood clot that has become stuck in the arteries. This can block or restrict blood flow, causing tissue damage or death in the affected area. Clots generally affect the arms, legs, or feet.

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7

Asthma Overview

Learn about asthma. Explore the types of asthma and read information about their symptoms, causes and treatments. Continue reading!

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8

Adult Respiratory Distress Syndrome

This condition is considered a medical emergency. Urgent care may be required.

Adult respiratory distress syndrome is a lung condition. It occurs when fluid fills up the air sacs in your lungs. It can eventually lead to organ failure.

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9

Raynaud's Phenomenon

Raynaud's phenomenon is a condition where blood flow to your fingers, toes, ears, or nose is restricted or interrupted. This occurs when the blood vessels in your hands or feet constrict. Episodes of constriction ar...

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10

Pneumothorax (Collapsed Lung)

Pneumothorax, or collapsed lung, occurs when air is trapped in the space around your lungs. Learn about the types of pneumothorax and the treatment for it.

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11

Pulmonary Fibrosis

Pulmonary fibrosis is a condition that causes lung scarring and stiffness. Learn about the causes, symptoms, and treatment options.

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12

Bronchiectasis

Bronchiectasis causes symptoms like chronic coughing, coughing up blood, wheezing, and shortness of breath. Read about treatment options.

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13

The Catastrophy of Cardiac Tamponade

This condition is considered a medical emergency. Urgent care may be required.

Cardiac tamponade is a very serious condition in which your heart can't pump enough blood to your body due to fluid buildup around your heart.

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14

Choking Adult Or Child Over 1 Year

This condition is considered a medical emergency. Urgent care may be required.

Choking occurs when a piece of food, an object, or a liquid becomes lodged in the throat. Children often choke as a result of placing foreign objects into their mouths. Adults normally choke due to breathing in fumes o...

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15

Cor Pulmonare

Cor pulmonale is a condition that most commonly arises out of complications from high blood pressure.

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16

RSV (Respiratory Syncytial Virus) Infection

RSV is virus that causes symptoms similar to those of a cold and occurs most frequently in children. Learn about causes and treatment.

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17

Getting a Handle on Aspiration Pneumonia

This condition is considered a medical emergency. Urgent care may be required.

Aspiration pneumonia is an inflammation (usually due to an infection) of your lungs and bronchial tubes that occurs after you inhale foreign matter.

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18

Tetralogy of Fallot (TOF)

Tetralogy of Fallot is a serious, congenital heart defect characterized by malformations of the heart and a bluish skin tone.

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19

Polycythemia Vera

Polycythemia vera (PV) is a bone marrow disorder in which the body produces an excessive amount of red blood cells. Red blood cells are responsible for carrying oxygen to all parts of the body. Blood is carrie...

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20

Epiglottitis

This condition is considered a medical emergency. Urgent care may be required.

Epiglottitis is characterized by inflamed tissue in your epiglottis. It's a potentially life-threatening illness. The epiglottis is at the base of the tongue.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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