Ulnar nerve entrapment of elbow is also called cubital tunnel syndrome. The ulnar nerve begins at the spinal cord in the neck and runs down the arm in to the hand. Elbow (olecranon) bursitis is inflammation and swelling in the elbow bursa, that's a skinny fluid-loaded sac at the idea https://www.theorthopaedicandpainpractice.com/the-latest-advances-in-elbow-nerve-pain-treatment/