This document discusses stress-related illnesses and their treatment. It describes how stress can cause real physical symptoms even when medical tests find nothing physically wrong. Stress-related illnesses fall into a third class of illnesses separate from psychiatric and organic illnesses. The document outlines how stress histories involving childhood trauma, depression, anxiety and other factors can contribute to unexplained physical symptoms. It recommends acknowledging a patient's resilience, relaxation techniques, writing, counseling and other treatments to help resolve stress-related illnesses.