Nail changes can reveal hidden health issues long before other symptoms appear. Here's what to watch for and why it matters.

Anemia results from iron or vitamin B12 deficiency ... an autoimmune condition that affects the skin and nails. In some cases, these changes can also be linked to alopecia areata, a disorder ...

Anemia reduces red blood cell levels, causing your skin, lips, and nail beds to appear unusually pale. This happens because hemoglobin, the protein that gives blood its red color, is lacking.