The doctor may also assess the individual for cardiac or respiratory symptoms.īlood oxygen tests are an essential aid in diagnosing cyanosis. Clubbed fingers can indicate congenital heart disease and lung problems. Raynaud’s phenomenon: People with this condition have decreased blood flow to the hands and feet due to blood vessel spasms.Ī doctor will diagnose cyanosis by performing a physical exam to look at the blue nails and check for finger clubbing.Polycythemia vera: This form of blood cancer causes the bone marrow to produce too many blood cells.Carbon monoxide poisoning: Carbon monoxide blocks hemoglobin’s oxygen-binding capabilities.People can have this condition from birth or develop it because of exposure to certain chemicals or to medicines such as antibiotics and local anesthetics. Methemoglobinemia: This condition causes increased levels of methemoglobin, a form of hemoglobin that cannot release oxygen.Some issues relating to the blood cells and vessels can also cause blue nails. Symptoms include shortness of breath, extreme fatigue, and swollen extremities. Congestive heart failure: Heart failure causes problems with the heart, leaving it unable to pump blood as it should.Eisenmenger’s syndrome causes high blood pressure and an abnormal flow of blood through the heart. Eisenmenger’s syndrome: This rare disorder affects the heart and lungs and is often a late complication of congenital heart disease.Although some cases will be asymptomatic, others will cause life threatening symptoms. Congenital heart disease: Babies can be born with abnormal heart and blood vessels.Some cases of blue nails might be due to a heart condition, such as: Usually, the clot travels from the leg or another part of the body and causes a life threatening blockage of blood flow to the lungs.
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