For the last 5-6 months, I have been having trouble with my elbow which is progressivly getting worse. If I keep my arm bent, it does not bother me. However, when I straighten my arm out it hurts. Also, there has been several times when I have been unable to lift anything that weights over a few pounds without pain and the feeling I am going to drop the item. Can anyone please give me some ideas as to what might cause this.