Medical News Today: What to know about bone spurs

Exostosis is a bone spur or outgrowth from the surface of a bone. Exostosis can affect any bone, including the knee and heel of the foot. The spur can occur inside the skull, for example, in the mouth, sinuses, or ear canal where it is called surfer’s ear. Hereditary exostoses can increase the risk of osteochondroma.

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