Persistent and excessive fear of a specific object or situation, such as flying, heights, animals, toilets, or seeing blood. Fear is cued by the presence or anticipation of the object/situation and exposure to the phobic stimulus results in an immediate fear response or panic attack. The fear is disproportionate to the actual danger posed by the object or situation. Commonly, adults with specific phobias will recognize that their fear is excessive or unreasonable.
The cause of panic attacks is unknown but there are several theories, including a chemical imbalance in the brain or a genetic predisposition. They can be triggered by a variety of conditions and situations, including the presence of a mood disorder, such as anxiety or depression; extreme stress over a long period of time; a physical health problem such as a heart, respiratory, or thyroid condition; overuse of alcohol, nicotine, or caffeine; and the side effects of some medical and recreational drugs. Frequent panic attacks generally indicate a panic disorder. Panic attacks can also occur while an individual is sleeping, causing them to wake up suddenly with feelings of fear and dread. Adolescents and young adults who have panic attacks often have other mental health issues or are at significant risk of developing other issues, such as obsessive-compulsive disorder, anxiety, or other mood disorders, eating disorders, and problems with substance abuse.
^ Leicht, Gregor; Mulert, Christoph; Eser, Daniela; Sämann, Philipp G.; Ertl, Matthias; Laenger, Anna; Karch, Susanne; Pogarell, Oliver; Meindl, Thomas; Czisch, Michael; Rupprecht, Rainer (2013). "Benzodiazepines Counteract Rostral Anterior Cingulate Cortex Activation Induced by Cholecystokinin-Tetrapeptide in Humans". Biological Psychiatry. 73 (4): 337–44. doi:10.1016/j.biopsych.2012.09.004. PMID 23059050.
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. 
Beta Blockers, also known as beta-adrenergic blocking agents, work by blocking the neurotransmitter epinephrine (adrenaline). Blocking adrenaline slows down and reduces the force of heart muscle contraction resulting in decreased blood pressure. Beta blockers also increase the diameter of blood vessels resulting in increased blood flow. Historically, beta blockers have been prescribed to treat the somatic symptoms of anxiety (heart rate and tremors) but they are not very effective at treating the generalized anxiety, panic attacks or phobias. Lopressor and Inderal are some of the brand names with which you might be familiar.
Panic attacks can occur due to number of disorders including panic disorder, social anxiety disorder, post traumatic stress disorder, drug use disorder, depression, and medical problems. They can either be triggered or occur unexpectedly. Smoking, caffeine, and psychological stress increase the risk of having a panic attack. Before diagnosis, conditions that produce similar symptoms should be ruled out, such as hyperthyroidism, hyperparathyroidism, heart disease, lung disease, and drug use.
Poor coping skills (e.g., rigidity/inflexible problem solving, denial, avoidance, impulsivity, extreme self-expectation, negative thoughts, affective instability, and inability to focus on problems) are associated with anxiety. Anxiety is also linked and perpetuated by the person's own pessimistic outcome expectancy and how they cope with feedback negativity. Temperament (e.g., neuroticism) and attitudes (e.g. pessimism) have been found to be risk factors for anxiety.
Mitral valve prolapse (MVP), also called "click murmur syndrome" and "Barlow's syndrome," is the most common type of heart valve abnormality. Usually, people with mitral valve prolapse have no signs and symptoms; however, if the prolapsed valve is severe, symptoms may appear. When symptoms of severe mitral valve prolapse do appear, they may include, fatigue, palpitations, chest pain, anxiety, migraine headaches, and pulmonary edema. Echocardiography is the most useful test for mitral valve prolapse. Most people with mitral valve need no treatment. However, if the valve prolapse is severe, treatment medications or surgery may be necessary to repair the heart valve.
I’ve had a lot of these symptoms and I know I also have depression. These anxiety attack’s come at the worst of times, when I work and I can’t get my mind focused back into what I need to do. I’m only 19 years old, but I’ve been to hell & back. Serving in the U.S.Marines to now, back home not doing anything I love after I got discharged. I feel lost and I haven’t got my life back together yet. I don’t have anyone to depend on besides my brother who is a Marine now, stationed 1000 miles away. I haven’t been able to establish myself well, since. I do have a wonderful girlfriend I love dearly and we have been together 2-years, traveling with me and moving near me. I’ve come home and things just feel like they’re slipping away. I was trained to not stress and be calm in the worst situations. But, even as a Marine, things can get very hard and wear on my mind. I thought nothing would be worse than Parris Island, but I am wrong. Life has been beating me down. I lost my car because someone sold me a stolen car and I feel like I’ve lost motivation to do my job; Walking and hitching rides to work to make best I can do. If there’s anyone that’s older that can give me some advice, that would be great. Because I don’t have a lot of people, my brother is not here, and I just need something. I want to do nothing but great things in this life. It’s just been hard to deal with lately and I’m losing hope. These anxiety attacks are slowly killing me. It’s every second of every-single-day.
Anxiety is typified by exaggerated worries and expectations of negative outcomes in unknown situations, and such concerns are often accompanied by physical symptoms. These include muscle tension, headaches, stomach cramps, and frequent urination. Behavioral therapies, with or without medication to control symptoms, have proved highly effective against anxiety, especially in children.
I’ve only recently started to experience anxiety attacks. My most recent one was last Monday night. I put my hands in the air, like a winners position, and counted down to 10. I then stood with my feet shoulders width apart and my hands on my hips. I focused on counting and my breathing. I did this repeatedly until I came out of my anxiety attack. By doing so I’m not allowing the anxiety to take control of my body. This is the only thing that beats my anxiety attacks. I hope that this helps someone else.
Panic attacks can happen during the day or night. Some people have one panic attack then don't ever experience another, or you might find that you have them regularly, or several in a short space of time. You might notice that particular places, situations or activities seem to trigger panic attacks. For example, they might happen before a stressful appointment.
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.
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
Panic attacks can occur unexpectedly during a calm state or in an anxious state. Although panic attacks are a defining characteristic of panic disorder, it is not uncommon for individuals to experience panic attacks in the context of other psychological disorders. For example, someone with social anxiety disorder might have a panic attack before giving a talk at a conference and someone with obsessive-compulsive disorder might have a panic attack when prevented from engaging in a ritual or compulsion.
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.