Knuckle Swelling

I generally play a few times a week for two hours each time. I have not changed my paddle or grip. I noticed that the last few times I have played, my fourth and fifth knuckles (ring finger and pinky) are painful and visibly swollen. I haven't been hit by the ball either. Does anyone know if there is any sort of compression brace or something I can wear to make it at least a little more comfortable?