What are the symptoms of a heel spur?
A heel spur on its own often causes no symptoms at all: it is a finding on an X-ray. When there is pain, it is usually felt under the heel, and it behaves like the pain the NHS describes for plantar fasciitis: pain on the bottom of the foot around the heel and arch, worse after rest, easing as you move, then worse again after long periods of standing or walking.
That overlap is the whole story of this page. The spur and the painful tissue sit at the same spot, and a 2012 study of 108 people with heel pain and spurs found that the pain could improve with no change in the spur on the X-ray. The painful structure is usually the soft tissue around the spur, which is covered on the plantar fasciitis page.