4 things your fingernails can tell you about your health.

http://www.medicaldaily.com/nailed-it-4-health-signs-you-can-learn-just-looking-your-fingernails-281556

Lack of Oxygen in Blood

Cyanosis, or the lack of oxygen in blood, can be easily spotted by its tendency to turn an individual’s nails a bluish tint. Red blood cells carry oxygen to the body's tissues and usually have a pink coloring. When the blood loses oxygen, it can turn a dark-bluish red and causes an individual’s skin and nails to take on a blue hue. Cyanosis is often indicative of lung problems and occurs when there are blood clots in the lungs, at high altitudes, in bronchiolitis, CODP, severe pneumonia, and a number of other lung-relatedconditions.

Nutritional Deficiencies

Koilonychia is a condition that causes the nails to become indented and curve inward like a spoon. It can indicate that either the body has too much iron (haemochromatosis) or too little iron (anemia). Pale, whitish-colored nails are also a common symton of anemia. Individuals suffering from malnutrition may also experience thin, brittle nails. Ridges along the nails can indicate an array of nutritional problems including iron, folic acid, and protein deficiency.