Heel pain is a common problem and can be caused by a range of different conditions.

See:

Plantar fasciitis

Baxters neuritis

Resources:

http://www.podiatry-arena.com/podiatry-forum/tags/index.php?tag=/heel-pain/

http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=26864

http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=56538

http://www.foot-health-forum.com/forum/tags.php?tag=heel+pain

http://www.foot-health-forum.com/forum/showthread.php?t=375

http://www.foot-health-forum.com/forum/showthread.php?t=410