What Causes Elbow Soreness And Swelling With Pain?

I have soreness, some swelling, slight discoloration at the inside of my right elbow where it meets the bicep area. I have had this condition since last Saturday. It started early during a family golf scramble, and since I did not want to quit I kept on playing, trying to ice it down with the hopes it would not get too bad. On the following Sunday I could hardly use the arm. It seemed to get a little better for the next couple of day, but now it is bothering me even at night when I am trying to sleep. At times I even feel some pain close to the wrist when or after I use the arm to lift something. Would this be a strain or pulled ligament, tendon, .........??