So, I learned when fighting wolves, you can apparently get a disease from them. And yes, I did learn this the hard way.
As usual, I was exploring, looking for shipwrecks, bandit camps, caves, etc. It was just a normal day, and a pack of the not-so-dreaded Ice Wolf shows up to join the 'party'. I easily defeat them, untill there is only one wolf left.
This is when I learned to carry Potions of Cure Disease with you on adventures.
Long story short, wolves can give you Rockjoint. Carry Potions of Cure Disease on you.
KnightlyUmbreon (AKA KU, William, amd sometimes Sir Knightly)