Conducting self-exams to catch early signs ... nail bed, you may be developing "spoon nails," or koilonychia. "Spoon-shaped nails that curve inwards can be a sign of iron-deficiency anemia ...

6. Spoon-shaped nails (coilonychia) Nails that appear concave, like spoons, can be a sign of iron deficiency anemia, hemochromatosis (excess iron in the body) or thyroid disorders. 7. Blue or ...