Unfortunately there are no known causes for it. They say about 20% of cases are posit with Hepatitis B or C but other then that no evidence as to causes.
This is my story about Polyarthritis Nodosa, sorry in advance for my poor english or grammar, it is not my first language.
When I was young, I was an active child that is into sports, biking, running, and overall playing. I was also the type of c...