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Corns Symptoms & Diagnosis


Symptoms of calluses include:

  • Rough, thickened area of skin
  • Painless or slight degree of pain or burning sensation
  • Yellow or reddish in color

Symptoms of corns include:

  • Small, usually very painful bump on the side, on the top, or between toes
  • Yellow or reddish in color


The doctor will examine the skin where a corn or callus has formed. Diagnosis is based on symptoms and visual observation of the corn or callus. They are easily distinguished by:

  • Location—Corns usually only form on or between the toes.
  • Degree of pain—Corns are usually quite painful, while calluses are usually painless or only slightly painful.

In order to distinguish a corn or callus from a wart , a doctor may pare the lesion with a sterile scalpel blade. Paring of a callus reveals layers of yellowish keratin; paring of a corn reveals a central translucent whitish yellow core, as opposed to the thrombosed capillaries and multiple bleeding points seen in a wart.

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