Radial tunnel syndrome is often a unusual, painful ailment that happens when tightness and swelling from the radial tunnel places too much tension on the radial nerve. A regular X-ray can check for deformities on the bone, bone spurs, or other abnormal structures which could be annoying the ulnar nerve. Verywell https://www.theorthopaedicandpainpractice.com/the-latest-advances-in-elbow-nerve-pain-treatment/