Ulnar neuropathy, also known as ulnar nerve entrapment, is the second-most common elbow entrapment neuropathy and is a common injury to a nerve that enters the fingers on the outside of the hand through the arm. While ulnar neuropathy is usually not harmful, if it is not treated properly, it can have long-lasting symptoms, such as paralysis and a loss of feeling in the affected arm or hand. However, with early identification and treatment, the majority of patients with ulnar neuropathy can make a full and successful recovery.