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There are several reasons why this might be.
Often the most common reason is that the person is cold. When this happens the body constricts peripheral arteries in order to keep core temperature high. When this happens our extremities (arms, hands, feet) get deprived of warm, oxygenated blood. The blood in the extremities is then used more thoroughly, and the content of oxygen falls. When this happens, blood turns from normal bright red to a more bluish dark color. This is what makes the fingernails blue, when a person is cold. If the person gets colder, this same exact things can be spotted in the lips and ears of a person.
It can also be caused from a person having a bad heart or from respiratory problems (pneumonia ect.). With a bad heart, the blood is not pumped around the body as well, and again the blood in the extremities will have to be used more thoroughly - with the darker color and blue fingernails as result. In respiratory problems the heart is working fine, however the blood is not oxygenated well enough. This will have the same general result: a blueish color of fingernails, lips, ears and sometimes cheeks. The medical term for this is "Cyanosis" as in: "A person turns cyanotic".
What else can I help you with?
Which of these is a sign of dehydration shivering sleepiness talkativeness blue fingernails?
blue fingernails
What do blue fingernails look like?
Blue fingernails should look fungi infection
Does money grow on fingernails?
AHHHHAHAHAHAHAHAHAH! (ROFL) I do not understand your question. It might be a saying. Money doesn't grow on fingernails.
Why are my fingernails blue?
If I were you, I would check my drinking water for nitrates. They are responsible for "blue baby syndrome", where skin turns blue, but I don't know about fingernails. nail polish tehe Family Feud answers: nail polish, cold, dead, bruised
When might it be acceptable for a food handler to wear false fingernails?
The only time that false fingernails or nail polish might be acceptable on a food handler is if they wear the appropriate gloves during all food handling tasks and the false fingernails do not protrude through the gloves.
Are blue fingernails a sign of dehydration?
Not really. Blue fingernails can be a sign of hypoxia, a lack of oxygen in the blood. This can happen at high altitude such as mountain climbing or flying in a depressurized airplane higher than about 12,000 feet altitude.
Why do dead people's fingernails turn blue?
After death, blood circulation stops, causing blood to pool in the capillaries under the fingernails. This pooling of deoxygenated blood can give the fingernails a bluish appearance due to lack of oxygen.
What might match someones shoes?
Footprints
What color should you paint your fingernails on a cloudy day?
blue w/ black crackle
White marks on your fingernails?
This might be because you dont drink enough milk !
What diseases can happen when someones nails goes into your skin?
The most likely is a staphylococcus infection, but the area under the fingernails may harbor all sorts of other pathogens, such as tetanus.
Are there fingernails on manatees?
yes. manatees might have once walked the earth, and lived on land
