Do i have ulnar nerve damage

For the past 3 or 4 weeks, almost every time I put either of my elbows down on a hard surface there is a sudden sharp pain that goes from the tip of my elbow to my ring and pinky finger. I have never had any problems with my elbows before, and there arent's any bruises on either of them. I don't know much about the Ulnar nerve and I want to learn a little more about it, so any comment will be greatly appreciated. Thank you.