Suggest Treatment For Injury In Little Finger

I jammed my left pinky finger on friday catching a football. I could still move it but kinda but i couldn't bend it because it was so stiff. It's wednesday now and it's not as nearly as stiff as it was on Friday but my left pinky kinda looks bigger than my right pinky and their is a bump on the left side of my pinky finger next to the knuckle.