This document discusses stress, including common causes of stress such as bereavement, family problems, illness, and job issues. It identifies different types of stressors including lifestyle stressors, mind stressors, body stressors, and work stressors. The biology of stress is examined, including shell shock/combat fatigue and the role of the amygdala in processing emotions. Symptoms of stress are outlined. Post-traumatic stress disorder is defined and its presenting symptoms, risk factors, and treatment options are described.