Pay attention if your feet are sending you any of these 15 warning signs.
Pitted toenails -- Many little holes, either deep or shallow, can show up on the toenails of up to half of all people with psoriasis. More than three-fourths of those with psoriatic arthritis can also have pitted, pocketed toenails.
iStock / gbh007
National Portrait Gallery, London
iStock / mashabuba
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