Comorbidity is more common than not with anxiety disorders, meaning that most individuals who experience significant anxiety experience multiple different types of anxiety. Given this co-morbidity, it is not surprising that many risk factors are shared across anxiety disorders, or have the same underlying causes. There is a lot of research identifying risk factors for anxiety disorders, and this research suggests that both nature and nurture are very relevant. It is important to note that no single risk factor is definitive - many people may have a risk factor for a disorder, and not ever develop that disorder. However, it is helpful for research to identify risk factors and for people to be aware of them, as being aware of who might be at risk can potentially help people get support or assistance in order to prevent the development of a disorder.
Secondly, the psychobiological conceptualization of panic disorder emphasizes the influence of psychological factors (Meuret, White, Ritz, Roth, Hofmann, & Brown, 2006). This psychological factor refers to a fear of bodily sensations, or a certain set of beliefs that lead individuals to be especially afraid of physical symptoms, such as believing that a racing heart could mean heart disease. Sometimes this is discussed as anxiety sensitivity or a belief that anxiety is harmful. Again, having the belief that physical symptoms are harmful may increase the likelihood of experiencing a panic attack, but it does not make having a panic attack inevitable. Instead, panic attacks can seem abnormal if they occur at the wrong time, when there is no real reason to be afraid. It is important to consider, however, that anxiety can also be adaptive or helpful in contexts where there is true threat.
Anxiety can be either a short-term 'state' or a long-term personality "trait". Trait anxiety reflects a stable tendency across the lifespan of responding with acute, state anxiety in the anticipation of threatening situations (whether they are actually deemed threatening or not). A meta-analysis showed that a high level of neuroticism is a risk factor for development of anxiety symptoms and disorders. Such anxiety may be conscious or unconscious.
Panic attacks may also be caused by substances. Discontinuation or marked reduction in the dose of a substance such as a drug (drug withdrawal), for example an antidepressant (antidepressant discontinuation syndrome), can cause a panic attack. According to the Harvard Mental Health Letter, "the most commonly reported side effects of smoking marijuana are anxiety and panic attacks. Studies report that about 20% to 30% of recreational users experience such problems after smoking marijuana."
Antidepressants are medications used to treat symptoms of depression but can also used to treat anxiety symptoms as well. In particular, selective serotonin reuptake inhibitors (SSRIs) and selective norepinephrine reuptake inhibitors (SNRIs) are the primary class of antidepressant used to treat anxiety. SSRIs commonly used to treat anxiety are escitalopram (Lexapro) and paroxetine (Paxil, Pexeva). SNRI medications used to treat anxiety include duloxetine (Cymbalta), venlafaxine (Effexor XR).
^ Anxiety: management of anxiety (panic disorder, with or without agoraphobia, and generalised anxiety disorder) in adults in primary, secondary and community care. National Institute for Health and Clinical Excellence. Clinical Guideline 22. Issue date: April 2007 "Archived copy" (PDF). Archived from the original (PDF) on 24 August 2009. Retrieved 2009-07-21. ISBN 1-84629-400-2
Everyone experiences anxiety from time to time. Perhaps the person has watched a scary move, or seen something upsetting on TV. Or, more ominous, perhaps the person has experienced or witnessed a crime. Anyone might get anxious in these situations, but the person with an anxiety disorder has persistent or recurrent anxiety that prevents him or her from full participation in life. Anxiety can range from relatively mild (occasional “butterflies,” jitteriness, accompanied by a sense of unease) to severe (frequent, disabling panic attacks). Severe anxiety disorders can lead the person to alter his lifestyle to accommodate the anxiety, for example not leaving home. More
Social Anxiety Disorder;Fear of social situations in which the person is exposed to unfamiliar people or to possible scrutiny by others. The individual fears that he or she will act in a way (or show anxiety symptoms) that will be embarrassing and humiliating, often times leading to avoidance of social situations and severe distress when participation in social situations can't be avoided. 
Cognitive Behavioral Therapy (CBT) is an example of one type of psychotherapy that can help people with anxiety disorders. It teaches people different ways of thinking, behaving, and reacting to anxiety-producing and fearful objects and situations. CBT can also help people learn and practice social skills, which is vital for treating social anxiety disorder.