Pay attention if your feet are sending you any of these 15 warning signs.
A sore that won't heal on the bottom of the foot -- Yahoo! says this is a major clue to diabetes, as elevated blood glucose levels lead to nerve damage in the feet and minor scrapes or irritations often go unnoticed.
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National Archives and Records Administration
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Jason Merritt/Getty Images for The Honest Company
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From Pilgrim's Pride via CNN
Joe Raedle/Getty Images, NBC Universal/'Maury’ via CNN
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