Panic attacks are generally brief, lasting less than 10 minutes, although some of the symptoms may persist for a longer time. People who have had one panic attack are at greater risk for having subsequent panic attacks than those who have never experienced a panic attack. When the attacks occur repeatedly, and there is worry about having more episodes, a person is considered to have a condition known as panic disorder.
When people are confronted with unpleasant and potentially harmful stimuli such as foul odors or tastes, PET-scans show increased bloodflow in the amygdala. In these studies, the participants also reported moderate anxiety. This might indicate that anxiety is a protective mechanism designed to prevent the organism from engaging in potentially harmful behaviors.
Until recently, panic disorder was not distinguished from agoraphobia (distressing anxiety resulting from being outside the home, travelling via public transit, being in open or claustrophobic environments, or being in crowds that generally leads to extreme avoidance due to fear of not being able to escape in those situations; APA, 2013). As it stands in the current Diagnostic and Statistical Manual of Mental Disorders - 5 agoraphobia is one of the most common disorders to co-occur with panic disorder. Current estimates contend that just under 2% of teens and adults have agoraphobia (Kessler et al., 2012). Often, people associate panic attacks or their panic disorder with certain places, people, or events and the fear of another attack occurring can lead to comorbid fears of the location or idea that there is no escape, which leads to extreme avoidance. Panic disorder can also occur simultaneously with other anxiety disorders, such as Generalized Anxiety Disorder (GAD) and/or Social Anxiety Disorder (SAD), for example.
Great questions. Unfortunately, there is usually no clear cut answer – and like many mental health disorders – it is likely caused by a combination of genetic, behavioral, and developmental factors. Anatomically speaking, Generalized Anxiety Disorder is most closely related to a disruption in the functional connectivity of the amygdala – the “emotional control center” of the brain – and how it processes feelings of fear and anxiety. Genetics also play a role in Generalized Anxiety Disorder. If you have a family member that also suffers from this disorder, your chances of suffering from it are increased, especially in the presence of a life stressor. Interestingly, long-term substance abuse also increases your chances of Generalized Anxiety Disorder, as the use of benzodiazepines can worsen your anxiety levels, as can excessive alcohol use. Tobacco use and caffeine are also both associated with increased levels of anxiety.
A healthy diet is also important to reduce and prevent anxiety. It seems counterintuitive that you can "eat your way to calm" but sustaining a healthy diet can really help you to feel more at ease on a regular basis, despite stressors. Some foods that are particularly helpful for reducing anxiety include foods with omega 3 fatty acids (i.e., salmon, walnuts, and flaxseed) and probiotics. Avoid greasy, sugary, high-fat, and processed foods. Additionally, avoiding caffeine when feeling anxious as well as unhealthy substances (i.e., alcohol) could be beneficial. Drinking alcohol might seem like a good way to calm down, but it can lead to sustained anxious symptoms. Incorporating a healthy diet into your lifestyle is fundamental to preventing and reducing anxiety.
If you are greatly afraid, however, such as being terrified that there is a burglar in your home that is about to harm you, the body produces a high degree stress response. We generally experience high degree stress responses as being anxiety attacks: where the changes are so profound they get our full attention. The greater the degree of anxiety and stress response, the more changes the body experiences.