2.This exposure happened either by directly experiencing the event(s), witnessing the event(s) in person, learning that the event(s) happened to a close friend or loved one (note: for cases of death or near death, it must have been violent or accidental), or being repeatedly exposed to the aversive details from traumatic events (e.g., as an emergency room doctor or nurse who frequently sees dead and mutilated bodies).
Panic attacks involve sudden feelings of terror that strike without warning. These episodes can occur at any time, even during sleep. People experiencing a panic attack may believe they are having a heart attack or they are dying or going crazy. The fear and terror that a person experiences during a panic attack are not in proportion to the true situation and may be unrelated to what is happening around them. Most people with panic attacks experience several of the following symptoms:
Panic attacks are sudden periods of intense fear that may include palpitations, sweating, shaking, shortness of breath, numbness, or a feeling that something bad is going to happen. The maximum degree of symptoms occurs within minutes. Typically they last for about 30 minutes but the duration can vary from seconds to hours. There may be a fear of losing control or chest pain. Panic attacks themselves are not typically dangerous physically.
When you have an attack, your breath is too short and shallow, meaning it worsens further symptoms. Once you feel the panic – stand up and start doing some simple stretching. If you manage to squeeze in a yawn, that will help you tame the attack even faster. Stretching and yawning instantly helps you relieve muscle tension and interrupt the vicious cycle that is just about to roll in full strength.
Some research suggests that people who have panic disorder might be very sensitive to sensory experiences (such as sunlight, smells and changes in the weather), but there's not enough evidence yet to say for sure. Also it's not clear whether having a high level of sensitivity to these sorts of things is something that might cause you to develop panic disorder, or whether it may be an effect of having it.
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.
Anxiety disorders often first appear in childhood. This is a very good time to intervene or seek treatment, because children's brains are still developing, and can more easily adapt to new "modes" of thinking, relative to adult brains. Helping your child cope with an anxiety disorder can be a complex task, potentially involving family members, friends, teachers and counselors, and mental health professionals. These five basic tips may also help:
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. 
Phobic avoidance – You begin to avoid certain situations or environments. This avoidance may be based on the belief that the situation you’re avoiding caused a previous panic attack. Or you may avoid places where escape would be difficult or help would be unavailable if you had a panic attack. Taken to its extreme, phobic avoidance becomes agoraphobia.
Panic attacks are common among all anxiety disorders but what sets panic disorder apart is that panic attacks are unexpected and occur "out of the blue" without an obvious trigger (American Psychiatric Association, 2013; Craske & Barlow, 2007). These unexpected panic attacks must be associated with a significant change in behavior or be followed by at least one month of persistent worry about having another attack or about what will happen if you have another panic attack.
The causes of anxiety attacks are not well understood. Some traumatic life events can set off anxiety attacks if the person is prone to depression or anxiety disorders. Also, medical conditions and some medications may trigger anxiety attacks. Many believe anxiety attacks run in families with a genetic predisposition. In other words, if your mom and her sister had anxiety attacks, it’s likely you will, too.
Another important prevention strategy for anxiety is to incorporate exercise into your daily activities. Exercise has been shown to decrease stress hormones that influence anxiety and also improve overall mood. Exercise can also help you disengage from worry and stress and focus on the current task of exercising. Exercises such as light jogging or brisk walking that can be incorporated into your daily activities can help reduce the impact of anxiety when it occurs.
It's important to note that everyone feels anxiety to some degree regularly throughout their life - fear and anxiety are adaptive and helpful emotions that can function to help us notice danger or threat, keep us safe, and help us adapt to the environment. Anxiety disorders represent states when fear or anxiety becomes severe or extreme, to the extent that it causes an individual significant distress, or impairs their ability to function in important facets of life such as work, school, or relationships. It is also important that risk factors don't at all imply that anxiety is anyone's fault; anxiety disorders are a very common difficulty that people experience. In this section, we will review risk factors for anxiety disorders. There are many potential risk factors for anxiety disorders, and most people likely experience multiple different combinations of risk factors, such as neurobiological factors, genetic markers, environmental factors, and life experiences. However, we do not yet fully understand what causes some people to have anxiety disorders.
What happens, exactly? "We all physically respond to stress," says Barbara O. Rothbaum, PhD, psychiatry professor and director, Trauma and Anxiety Recovery Program, at Atlanta's Emory University School of Medicine. "You might feel anxious about work-related problems, taking a big exam, or making an important decision. But someone who suffers from panic disorder may react to those same moderate pressures with an exaggerated physical reaction-as if he or she were about to be attacked by a wild tiger or fall from a great height. It's full-on, adrenaline-pumping, fight-or-flight response."
The cause of anxiety disorders is a combination of genetic and environmental factors. Anxiety can stem itself from certain factors: genetics, medicinal side-effects, shortness of oxygen. Risk factors include a history of child abuse, family history of mental disorders, and poverty. Anxiety disorders often occur with other mental disorders, particularly major depressive disorder, personality disorder, and substance use disorder. To be diagnosed symptoms typically need to be present at least six months, be more than would be expected for the situation, and decrease functioning. Other problems that may result in similar symptoms including hyperthyroidism, heart disease, caffeine, alcohol, or cannabis use, and withdrawal from certain drugs, among others.
Social anxiety disorder (previously called social phobia): People with social anxiety disorder have a general intense fear of, or anxiety toward, social or performance situations. They worry that actions or behaviors associated with their anxiety will be negatively evaluated by others, leading them to feel embarrassed. This worry often causes people with social anxiety to avoid social situations. Social anxiety disorder can manifest in a range of situations, such as within the workplace or the school environment.