Genetic risk factors have been documented for all anxiety disorders. Clinical genetic studies indicate that heritability estimates for anxiety disorders range from 30-67%. Many studies, past and present, have focused on identifying specific genetic factors that increase one's risk for an anxiety disorder. To date, an array of single nucleotide polymorphisms (SNPs) or small variations in genetic code, that confer heightened risk for anxiety have been discovered. For the most part, the variants that have been associated with risk for anxiety are located within genes that are critical for the expression and regulation of neurotransmitter systems or stress hormones.
The problem with catastrophizing is that it is rigid thinking. Suppose you worry that you’re having a heart attack every time you experience some chest pain. It’s usually easy for a health professional to distinguish between anxiety and a heart attack. But catastrophizing resists new information. Even though, your doctor has done tests in the past and has reassured you many times, you worry that this time will be different. Your exaggerated fear is preventing you from changing your thinking, and is keeping you stuck.

For me it’s knowing or believing I don’t have enough time to finish an assignment, and then I feel like a failure. Right now, I’m doing the most difficult assignment of my life, and if I don’t finish it on time, my graduation will be delayed. This is on top of all my other responsibilities. And to think that I’m supposed to have an accommodation for extra time. Ha! The university and the state don’t care. They just want me to fail so I have to dish out more money to line the pockets of the corporation that assigned this required project.


Your heart beats fast, and your breathing speeds up. Your chest may feel tight, and you might start to sweat. If you've ever felt it, you know that anxiety is just as much a physical state as a mental state. That's because there's a very strong biological chain reaction that occurs when we encounter a stressful event or begin to worry about potential stressors or dangers in the future. Other physical symptoms include sweating, headaches, and insomnia. Psychological symptoms may include feeling restless or irritable, feeling tense, having a feeling of dread, or experiencing ruminative or obsessive thoughts. 
People with panic disorder often worry about when the next attack will happen and actively try to prevent future attacks by avoiding places, situations, or behaviors they associate with panic attacks. Worry about panic attacks, and the effort spent trying to avoid attacks, cause significant problems in various areas of the person’s life, including the development of agoraphobia (see below).
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