Haglund’s Deformity is an enlargement of the bone at the back and top of the heel bone where the achilles tendon inserts into the bone. It can become painful from the rubbing of the shoe.
http://www.podiatry-arena.com/podiatry-forum/tags/index.php?tag=/haglund-deformity/ (Podiatry Arena)
http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=2280 (Podiatry Arena)
http://www.podiatryabc.com/h-is-for-haglunds-deformity/ (Podiatry ABC)
http://www.chiropodisttoday.org.uk/blog/pump-bump/60/ (Chiropodist Today)