Cindy Chow BSc(Hon), DCh.
Chiropodist • Foot Specialist licensed in Ontario
4675 Steeles Ave E, Unit #1C25,
Scarborough, Ontario, M1V 4S5
Tel. (905) 943-7575 | www.villagefootclinicmarkham.com

Subungal Exotosis (bone spur under toenail)

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Informative Websites:

  • Ontario Society of Chiropodists (professional voluntary group for Chiropodists of Ontario) www.ontariochiropodist.com/
  • Canadian Federation of Podiatric Medicine (professional voluntary group for Chiropodists and Podiatrists of Canada)   www.podiatryinfocanada.ca/
  • College of Chiropodists of Ontario (required licensing body for Chiropodists and Podiatrists of Ontario) www.cocoo.on.ca/


Subungal exostosis is more commonly referred to as a bone spur under the toenail. This condition is generally caused by toe trauma, which results in the formation of a bony irregularity or prominence. The normal treatment for subungal exostosis is surgical removal. Other small tumors, called osteochondromas and enchondromas, can also form in the bone beneath the toenail.