What are corns?

Corns, also referred to as clavi, are painful hypertrophy of skin, forming a skin swelling, that develop in response to excess pressure or friction on the bony prominences of the feet and toes. Foot Skin developed corns due to chronic or intermittent pressure and friction, excessive skin thickening, and thick skin cocoon formation. After the formation of corns, there are pyramidal or eye-shaped raised skin swelling. Corns mostly grow in the feet and toes.


Corns are caused by pressure from unyielding structures.  Abnormal mechanical stress may be intrinsic or extrinsic.  Extrinsic factors include poorly fitting footwear and heavy activity (athletics). Intrinsic factors include foot deformities (hammer toe, bunion); abnormal foot mechanics (acquired or hereditary); and peripheral neuropathy.


When walking or wearing shoes, patients will feel pain over the corns .


Consider the following treatments:

Frequently Asked Questions

Q: Do I need to treat the corn in my foot/ toe?
A: If your feels pain when walking, you should consider treatment.

Q: How do I prevent corns?
A:  Avoid tight or too loose shoes.  Wear thick socks.  Correct underlying foot abnormality.

Q: How can I differentiate corns between warts?
A: corns and foot warts biggest difference from the site of infection, characterization and number to distinguish.

  Corns Warts
Affected area Pressure or friction point of feet and toes, e.g. in between toes, at the lateral side of little toe, plantar area of feet Heel, bottom of big toe, plantar area of forefoot
  • Thicken skin
  • No central black dots
  • Central raised white or yellow dead skin cocoon/ swelling
  • Dry rough surface
  • Tiny Central black dots
  • Villous spikes seen under magnifying glass
Number Isolated one In groups of few to dozens