Panic disorder is a type of anxiety disorder characterized by recurrent and unexpected panic attacks—sudden, intense episodes of fear or discomfort that often include physical symptoms like rapid heartbeat, sweating, shaking, shortness of breath, chest pain, dizziness, or a feeling of losing control. These attacks can occur without any clear trigger and may happen at any time, even during relaxation. Over time, people with panic disorder often develop fear of having another attack, which can lead them to avoid places or situations where they previously experienced an attack, limiting their normal activities and affecting their quality of life. Normal fears, on the other hand, are temporary emotional responses to real-life stressors or potential dangers. For example, feeling nervous before a big presentation or being scared when watching a horror movie are typical experiences that are generally not overwhelming and don't interfere with a person’s daily life. Unlike panic disorder, normal fears are situational and proportional to the event at hand, and once the situation resolves, the fear usually fades. In contrast, panic disorder involves unexpected and intense feelings of fear that can happen without an obvious cause, and the anxiety tends to persist.