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If you have a healthy blood supply, your nails will show a peachy pink. The fingernails can show most of your health problems.

* Discolored nails: Diabetes, stress, Allergies and simple illness can cause your nails to appear discolored.

* A greenish nail color, however, can be a sign of infection, either in the nail bed or in your system.

* Bluish nail beds can be a sign of lung problems. This could be emphysema or even asthma (asthma doesn't usually show up in the nails). It can also be a sign of poor circulation. A simple dark blue line in the nail can be a sign of skin cancer.

* Tiny black streaks can indicate a heart problem.

* Reddish-brown spots can indicate a deficiency of folic acid, protein or Vitamin C. * Yellowing nails are early signals of various internal disorders, such as diabetes, respiratory or liver problems.

* White lines in or across the nail can signal general sickness, fever, liver or Heart disease, some kidney disorders or, more likely; a lack of iron or zinc in your diet.

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17y ago

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