The appearance of your fingernails can change with certain medical conditions. Kidney disease is associated with multiple distinctive nail problems. A buildup of nitrogen waste products occurs in the bodies of people with kidney disease, which can lead to changes in finger and toenails. Other conditions such as malnutrition and medications can contribute to changes in the nails. See your doctor for an accurate diagnosis if you notice changes in your fingernails.
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One type of nail change is called Beau's lines -- transverse ridges that go across the nail, affecting all of your nails. Beau's lines are a result of an acute kidney disease that interferes with the growth of the nail.
Kidney disease causes koilonychia -- ridged nails that are somewhat spoon-shaped and concave. This change is associated with iron-deficiency anemia, which commonly occurs in people with kidney disease.
White Streaks and Spots
White streaks and spots on your fingernails occur with a condition called leukonychia. This condition is associated with chronic renal disease.
Half-and-half nails -- also known as Lindsay's nails -- also occur with kidney disease. The bottom portion of the nail is white, while the top of your nail is brown. Swelling of the nail bed causes the bottom of the nail to become white.
Brittle nails may chip or crack easily. While brittle nails are a common sign of aging, they also occur in people with kidney disease.