A Telltale Sign in Your Fingernails That May Reveal Something About Your Health
Your fingernails can provide clues about what is happening inside your body, but claims that a particular nail feature can accurately predict how long someone will live are not supported by a single, reliable test.
One nail finding that has attracted medical attention is nail clubbing. In people with clubbing, the fingertips become enlarged and the nails curve more strongly around the fingertips. The angle between the nail and surrounding skin can change, and the nail may appear more rounded or “bulbous.”
Clubbing itself is not a disease. Rather, it can sometimes be a physical sign associated with an underlying medical condition. It has been observed in some people with lung diseases, heart conditions, gastrointestinal disorders and certain cancers, although it can also occur for other reasons and, in some cases, may run in families.
Another commonly discussed nail feature is a white or pale nail appearance. Changes in nail color, texture or thickness can occasionally accompany nutritional deficiencies, chronic illnesses, infections or other conditions. However, these signs are often nonspecific. A person should not assume that a nail change means they have a particular disease.
What about life expectancy?
Researchers have investigated whether visible physical characteristics—including nail changes—can provide information about overall health and mortality risk. Some studies have found associations between certain physical signs and underlying diseases that themselves affect longevity. But an association is not the same as a prediction of an individual’s lifespan.
For example, if a nail abnormality is associated with a disease that carries increased health risks, doctors may investigate the underlying condition. Treating that condition could potentially improve health outcomes. The nail finding itself, however, does not provide a countdown clock for someone’s life.
When should you see a doctor?
A new or unexplained change in your nails deserves attention, particularly if it develops along with other symptoms. Seek medical advice if you notice:
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Persistent nail clubbing or enlargement of the fingertips
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A new dark or unusual streak under a nail
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Nails becoming significantly thicker, thinner or distorted
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Nails separating from the nail bed
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Persistent changes affecting several nails
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Nail changes accompanied by unexplained weight loss, persistent cough, breathing difficulties, fatigue or other concerning symptoms
