M77.3: Calcaneal spur
A heel spur is a bony projection behind or beneath the heel bone.
The foot is made up of a lot of small bones and joints. The lower leg is connected to the tarsus. Then comes the metatarsus and then the individual toes. The heel bone is part of the tarsus. It is located at the back of the foot. You can feel your calcaneus in your heel.
A heel spur can form if the foot is very heavily, or incorrectly, loaded. A heel spur can be painful when running, for example.
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