Although breathing into a paper bag was a common recommendation for short-term treatment of symptoms of an acute panic attack, it has been criticized as inferior to measured breathing, potentially worsening the panic attack and possibly reducing needed blood oxygen. While the paper bag technique increases needed carbon dioxide and so reduces symptoms, it may excessively lower oxygen levels in the blood stream.
It is not clear what causes panic disorder. In many people who have the biological vulnerability to panic attacks, they may develop in association with major life changes (such as getting married, having a child, starting a first job, etc.) and major lifestyle stressors. There is also some evidence that suggests that the tendency to develop panic disorder may run in families. People who suffer from panic disorder are also more likely than others to suffer from depression, attempt suicide, or to abuse alcohol or drugs.
Approximately one-third of people with panic disorder will also develop agoraphobia. People with agoraphobia are afraid that they will have some anxiety symptoms or a full-blown panic attack in a place where it would be very challenging or embarrassing for them to flee. This condition can lead to avoidance behaviors, in which they try to stay away from all places or situations in which they may have a panic attack.
Physical symptoms of an anxiety disorder can be easily confused with other medical conditions, like heart disease or hyperthyroidism. Therefore, a doctor will likely perform an evaluation involving a physical examination, an interview and lab tests. After ruling out an underlying physical illness, a doctor may refer a person to a mental health professional for evaluation.