This is for you dad.
Here's the injury-http://en.wik ipedia.org/wiki/Pilo nidal_sinus
And the surgery they did is-http://www.worldw idewounds.com/2003/d ecember/Miller/Pilon idal-Sinus.html
It sucks and the pills i got for the pain are-http://en.wikipe dia.org/wiki/Hydromo rphone