The nature of a phobia and how it forms is such that anything and everything can become a trigger for it, though there are a few common causes. People who are caught in a situation where they are forced into contact with the trigger of their phobia, nearly anything can happen. Heart palpitations, sweaty palms, increased heart rate, and shallow breathing are just some of the many possible physical effects. People who tend to be prone to anxiety are also prone to some severe reactions to a phobia attack, with some experts theorizing that the psychological propensity towards one also lends to the likelihood of suffering from the other. However, the real long-term damage lies in how it affects the mental processes.
People who have a phobia are adept at picturing scenarios of being trapped with the object, situation, or thought that triggers the said irrational fear. These thoughts often come with an incredible level of detail, which only serves to enforce the fear that is the root of the image. Patients with this condition also become adept at making excuses to avoid being put into a situation that forces a real life confrontation with their fears, such as taking the stairs instead of the elevator and faking excuses to avoid going to high places.
The positive side of this condition is that it forces people to be creative, because the adrenaline rush caused by a fear reaction can only last so long. The mind becomes adept at creating scenarios and making conjectures that force the body to keep the adrenaline coming. The negative of this, however, is that the mind is incapable of discerning between reality, perception, and imagination whenever a fear trigger is fired.
A person with a phobia is not always easy to detect. Some of the more common triggers for an attack are very similar to things that most people are afraid of, such as heights or snakes. The significantly more intense reaction is often dismissed by most casual observers. Similar to depression, a person that has one of the many types of phobias may not even recognize that he has a problem that needs to be dealt with. Most experts in the field believe that, like the numbers representing depression and social anxiety disorder, the number of people with phobias is inaccurate because most cases are not even being reported.