Demographic factors also impact risk for anxiety disorders. While there is not a strong consensus, research suggests that risk for anxiety disorders decreases over the lifespan with lower risk being demonstrated later in life. Women are significantly more likely to experience anxiety disorders. Another robust biological and sociodemographic risk factor for anxiety disorders is gender, as women are twice as likely as men to suffer from anxiety. Overall symptom severity has also been shown to be more severe in women compared to men, and women with anxiety disorders typically report a lower quality of life than men. This sex difference in the prevalence and severity of anxiety disorders that puts women at a disadvantage over men is not specific to anxiety disorders, but is also found in depression and other stress-related adverse health outcomes (i.e. obesity and cardiometabolic disease). Basic science and clinical studies suggest that ovarian hormones, such as estrogen and progesterone, and their fluctuations may play an important role in this sex difference in anxiety disorder prevalence and severity. While changes in estrogen and progesterone, over the month as well as over the lifetime, are linked to change in anxiety symptom severity and have been shown to impact systems implicated in the etiology of anxiety disorders (i.e. the stress axis), it still remains unclear how these hormones and their fluctuations increase women's vulnerability to anxiety.

A panic attack is an abrupt surge of intense fear or discomfort that reaches a peak within minutes, and during which time a variety of psychological and physical symptoms occur. These symptoms include rapid heart rate, sweating, shaking, shortness of breath, hot flashes, and lightheadedness—as well as a sense of impending doom, chills, nausea, abdominal pain, chest pain, headache, and numbness or tingling.

Most people have experienced fleeting symptoms associated with anxiety disorders at some point in their life. Such feelings — such as having a shortness of breath, feeling your heart pounding for no apparent reason, experiencing dizziness or tunnel vision — usually pass as quickly as they come and don’t readily return. But when they do return time and time again, that can be a sign that the fleeting feelings of anxiety have turned into an anxiety disorder.

So, if anxiety has so many negative effects, why is it relatively common? Many scientists who study anxiety disorders believe that many of the symptoms of anxiety (e.g., being easily startled, worrying about having enough resources) helped humans survive under harsh and dangerous conditions. For instance, being afraid of a snake and having a "fight or flight" response is most likely a good idea! It can keep you from being injured or even killed. When humans lived in hunter-gatherer societies and couldn't pick up their next meal at a grocery store or drive-through, it was useful to worry about where the next meal, or food for the winter, would come from. Similarly avoiding an area because you know there might be a bear would keep you alive —worry can serve to motivate behaviors that help you survive. But in modern society, these anxiety-related responses often occur in response to events or concerns that are not linked to survival. For example, seeing a bear in the zoo does not put you at any physical risk, and how well-liked you are at work does not impact your health or safety. In short, most experts believe that anxiety works by taking responses that are appropriate when there are real risks to your physical wellbeing (e.g., a predator or a gun), and then activating those responses when there is no imminent physical risk (e.g., when you are safe at home or work).

The buildup phase of a panic attack is the most important phase, because it is when you can prevent it. If you are under chronic stress, you become worn down and have no reserve left. Anything can push you over the edge. But if you regularly reduce your stress through a combination of cognitive behavioral therapy and mind-body relaxation, you will have enough reserve left to handle life’s surprises.

People with generalized anxiety disorder (GAD) display excessive anxiety or worry, most days for at least 6 months, about a number of things such as personal health, work, social interactions, and everyday routine life circumstances. The fear and anxiety can cause significant problems in areas of their life, such as social interactions, school, and work.