Panic attacks, on the other hand, are short bursts of intense fear often marked by increased heart rate, brief chest pain or shortness of breath. Typically lasting fewer than 30 minutes, they could occur once or repeatedly — sometimes without reason. These episodes can send patients to the emergency room, as they are sometimes mistaken for a heart attack.
Panic disorder is a diagnosis given to people who experience recurrent unexpected panic attacks— that is, the attack appears to occur from out of the blue. The term recurrent refers to the fact that the individual has had more than one unexpected panic attack. In contrast, expected panic attacks occur when there is an obvious cue or trigger, such as a specific phobia or generalized anxiety disorder. In the U.S., roughly 50% of people with panic disorder experience both unexpected and expected panic attacks.
Obsessive-compulsive and related disorders are characterized by obsessive, intrusive thoughts (e.g. constantly worrying about staying clean, or about one's body size) that trigger related, compulsive behaviors (e.g. repeated hand-washing, or excessive exercise). These behaviors are performed to alleviate the anxiety associated with the obsessive thoughts. These types of disorders can restrict participation in everyday life and/or generate significant distress, for instance, by making it difficult to leave the house without many repetitions of a compulsive behavior (e.g. checking that the doors are locked). Periodically experiencing worry or having a few "idiosyncratic" habits does not constitute an obsessive-compulsive or related disorder. Instead, these disorders are characterized by unusually high levels of worry and related compulsive behaviors, in comparison with a typical range of individuals.
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.
Occasional anxiety is an expected part of life. You might feel anxious when faced with a problem at work, before taking a test, or before making an important decision. But anxiety disorders involve more than temporary worry or fear. For a person with an anxiety disorder, the anxiety does not go away and can get worse over time. The symptoms can interfere with daily activities such as job performance, school work, and relationships.