Often perceived as a nightmarish experience, consisting of intense dread, terror and a feeling of impending death, which can last from anywhere between a few minutes to hours in duration. The sufferer will commonly experience symptoms such as shortness of breath, sweating, dizziness, faintness, feelings of non-reality, chest pains and overwhelming fear.
The memory of their panic attack can create a sense of dread. This then becomes a conditioned effect where the brain tries creates coping mechanisms which is designed to prevent such things from happening again, so it will show the person that certain locations, atmospheres, people etc. should be avoided at all costs. If this gets out of control it will manifest as a disorder which prevents the person from going out in public and have a negative impact on their life.
Often people who have phobic disorders like agoraphobia in this case, which is the fear of open spaces, may have such a fear because of previous panic attacks that may have happened in open public spaces.
Generalised anxiety disorder or its common abbreviation GAD is when the sufferer of the condition continually feels tense, agitated, on-edge and apprehensive. They will experience unfocused, negative and out-of-control feelings, which creates a continual sense of worry that either something is wrong or that something bad is going to happen.