If your nails look like those in below pictures, you'll need to pay attention because it indicates kidney problem.

The nails in the pictures are named Half-and-Half nails, or Lindsay's nails.
Lindsay’s nails were described in 1967 as red, pink, or brown bands occupying 20 to 60% of the nail bed in patients with chronic kidney disease. Clinically, patients' fingernails show a pinkish red band occupying 50% of the nail bed distally and a white band proximally. The proximal white band is thought to result from chronic anemia and the brown band from increased melanin deposition distally, possibly from an increased concentration of β-melanocyte–stimulating hormone.
Lindsay's nails can be found in up to 40 % of patients of chronic kidney disease. By blood test, patients show abnormally high value of creatinine.
There's no specific treatment on the nails other than the treatment on kidney dysfunction.
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