Panic Disorder is characterized by repeated, unexpected panic attacks. A panic attack is a sudden rush of intense fear or discomfort that reaches a peak within minutes and during which time other symptoms occur, like pounding or rapid heart rate, sweating, trembling or shaking, difficulty breathing, chest pain or discomfort, nausea, or feeling dizzy or light-headed. The person may also fear losing control, "going crazy", or fear that they are dying. After the panic attack, the person worries about having additional panic attacks and avoids situations that they feel may lead to a panic attack. Like other Anxiety Disorders, these problems cause significant distress or impairment in major areas of life, like work, school, or relationships.