This publication is in the public domain and may be reproduced or copied without permission from NIMH. Citation of NIMH as a source is appreciated. We encourage you to reproduce it and use it in your efforts to improve public health. However, using government materials inappropriately can raise legal or ethical concerns, so we ask you to use these guidelines:
In a decision context, unpredictability or uncertainty may trigger emotional responses in anxious individuals that systematically alter decision-making.[46] There are primarily two forms of this anxiety type. The first form refers to a choice in which there are multiple potential outcomes with known or calculable probabilities. The second form refers to the uncertainty and ambiguity related to a decision context in which there are multiple possible outcomes with unknown probabilities.[46]

If left untreated, anxiety may worsen to the point at which the person's life is seriously affected by panic attacks and by attempts to avoid or conceal them. In fact, many people have had problems with friends and family, failed in school, and/or lost jobs while struggling to cope with this condition. There may be periods of spontaneous improvement in the episodes, but panic attacks do not usually go away unless the person receives treatments designed specifically to help people with these symptoms.
Because there are many medical conditions that can cause anxiety attack signs and symptoms, such as the strong sensations and feelings associated with anxiety attacks, it’s wise to discuss them with your doctor. If your doctor has attributed your anxiety attacks to stress and anxiety, you can feel confident that your doctor’s diagnosis is correct. Anxiety attacks and their signs and symptoms are relatively easy to diagnose and aren’t easily confused with other medical conditions.
People with panic disorder often worry about when the next attack will happen and actively try to prevent future attacks by avoiding places, situations, or behaviors they associate with panic attacks. Worry about panic attacks, and the effort spent trying to avoid attacks, cause significant problems in various areas of the person’s life, including the development of agoraphobia (see below).