Anxiety cannot increase forever and you cannot experience peak levels of anxiety forever. Physiologically there is a point at which our anxiety cannot become any higher and our bodies will not maintain that peak level of anxiety indefinitely. At that point, there is nowhere for anxiety to go but down. It is uncomfortable to reach that peak but it is important to remember this anxiety will even out and then go down with time.
In Europe about 3% of the population has a panic attack in a given year while in the United States they affect about 11%. They are more common in females than males. They often begin during puberty or early adulthood. Children and older people are less commonly affected. A meta-analysis was conducted on data collected about twin studies and family studies on the link between genes and panic disorder. The researchers also examined the possibility of a link to phobias, obsessive-compulsive disorder (OCD), and generalized anxiety disorder. The researchers used a database called MEDLINE to accumulate their data. The results concluded that the aforementioned disorders have a genetic component and are inherited or passed down through genes. For the non-phobias, the likelihood of inheriting is 30%-40% and for the phobias, it was 50%-60%.
Generally, anxiety arises first, often during childhood. Evidence suggests that both biology and environment can contribute to the disorder. Some people may have a genetic predisposition to anxiety; however, even so, development of the condition is not inevitable. Early traumatic experiences can also reset the body’s normal fear-processing system so that it is hyper-reactive.
Obsessive-compulsive disorder (OCD) is characterized by unwanted thoughts or behaviors that seem impossible to stop or control. If you have OCD, you may be troubled by obsessions, such as a recurring worry that you forgot to turn off the oven or that you might hurt someone. You may also suffer from uncontrollable compulsions, such as washing your hands over and over.
Post-traumatic stress disorder (PTSD) is an extreme anxiety disorder that can occur in the aftermath of a traumatic or life-threatening event. PTSD can be thought of as a panic attack that rarely, if ever, lets up. Symptoms of PTSD include flashbacks or nightmares about what happened, hypervigilance, startling easily, withdrawing from others, and avoiding situations that remind you of the event.
The symptoms of a panic attack may cause the person to feel that their body is failing. The symptoms can be understood as follows. First, there is frequently the sudden onset of fear with little provoking stimulus. This leads to a release of adrenaline (epinephrine) which brings about the fight-or-flight response when the body prepares for strenuous physical activity. This leads to an increased heart rate (tachycardia), rapid breathing (hyperventilation) which may be perceived as shortness of breath (dyspnea), and sweating. Because strenuous activity rarely ensues, the hyperventilation leads to a drop in carbon dioxide levels in the lungs and then in the blood. This leads to shifts in blood pH (respiratory alkalosis or hypocapnia), causing compensatory metabolic acidosis activating chemosensing mechanisms which translate this pH shift into autonomic and respiratory responses. The person him/herself may overlook the hyperventilation, having become preoccupied with the associated somatic symptoms.
Generalized Anxiety Disorder (GAD) is characterized by chronic and exaggerated worry and tension, much more than the typical anxiety that most people experience in their daily lives. People may have trembling, twitching, muscle tension, nausea, irritability, poor concentration, depression, fatigue, headaches, light-headedness, breathlessness or hot flashes.
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 degree of accompanying stress response and its physiological, psychological, and emotional changes are directly proportional to the degree of anxiety. For example, if you are only slightly concerned, such as being slightly nervous about meeting someone new, the body produces a small degree stress response. The small degree stress response can be so slight that you don’t even notice it.