Swelling of the knuckles is the main symptom of ulnar ... it can move to the proximal interphalangeal (PIP) joint in the middle of the finger and then travel to the other joints in the hand ...

Sprains and dislocations can cause pain and swelling ... Sprains can be in any of the knuckle joints in your finger. However, the joint in the middle of your finger—called the proximal interphal ...