The DIP joint is the primary knuckle in the major of your finger. It connects the distal phalanx and Center phalanx, that are The 2 bones within the idea from the finger. It is possible to address this in your house with ice and rest. An X-ray will be important https://www.theorthopaedicandpainpractice.com/why-are-my-finger-joints-swollen-and-painful/