Concave Nails Could be a Sign of Anemia: MD Podiatrist

Doctors can underestimate the importance of your feet and toes, too. “I’ve had patients go for a skin check, and they’re not even told to take off their socks and shoes,” says Dan Michaels, DPM.
 
Some people are born with concave or “spoon” nails. But a case that appears out of the blue warrants a check. If your toenails look scooped out, with an indentation big enough to hold a drop of water, it’s often a sign of anemia, Dr. Michaels says. That scooped-out nail could also be pointing to a range of autoimmune disorders or hypothyroidism.