Traumatic situations that cause post-trauma symptoms vary quite dramatically from person to person. Indeed, it is very subjective and it is important to bear in mind that it is defined more by its response than its trigger. Response to a traumatic event varies significantly among people, but there are some basic, common symptoms. Emotional signs include: Sadness, anger, denial, fear and Shame. These may lead to nightmares, insomnia, difficulty with relationships, emotional outbursts. Common physical symptoms are nausea, dizziness, altered sleep patterns, changes in appetite, headaches, and gastrointestinal problems. Psychological disorders may include PTSD, Depression. anxiety, dissociative disorders and substance abuse problems. While there are not any objective criteria to gauge which events will cause post-trauma symptoms, circumstances typically involve the loss of control, betrayal, abuse of power, helplessness, pain, confusion, and/or loss. The event needn't rise to the extent of war, natural disaster, nor personal assault to affect an individual profoundly and alter their experiences.