In the first days and weeks after a traumatic event, people often experience strong feelings of fear, sadness, guilt, anger, or grief. As they begin to make sense of what has happened to them, these feelings usually begin to subside. Most people will recover quite quickly with the support of family and friends. For some people though, a traumatic event can lead to mental health issues such as posttraumatic stress disorder (PTSD), depression, anxiety, alcohol and drug use, as well as impacting on their relationships with family, friends, and at work.