What to do if your elbow hurts? Dr. Bastian Marquass, specialist in orthopedics, trauma surgery and sports medicine at the Joint Clinic Gundelfingen provides answers Arthritis, bursitis, tennis elbow - elbow pain can have many causes. Privatdozent Dr. Bastian Marquass, specialist for orthopedics, trauma surgery and sports medicine at the Joint Clinic Gundelfingen, explains the most common complaints and proven treatment options.