A heel spur, or calcaneal spur, is a bony growth of calcium deposits on the back or bottom of the heel bone that often has a hooked, pointy, or shelf-like shape. Heel spurs develop when strain or ...

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Illustration by Yaja’ Mulcare. Plantar fasciitis causes pain in the bottom of the heel. The plantar fascia is a thick, weblike ligament that connects the heel to the front of the foot.

It is characterized by deposition of calcium as a response to repeated stress on the heel. It is caused due to strain of muscle and ligaments around the heel, repeated damage and stress of the heel.