A chronic disorder, there is no proven theory to the cause of all anxiety, but there is one kind of anxiety to which most people have suffered, where the cause is known. Let's say that you were riding your bike, then the wheel slipped on a rock and you fell down. The next time you ride your bike past the spot where you fell, you might be anxious, having an uncomfortable fear of danger that will happen. Psychiatrists have found that anxiety can be caused when a bad experience happened that involved a previously neutral object, or place. Thus you associate the pain you got from falling down, with the spot where you fell.
Anxiety can be a symptom in other disorders, or anxiety can be the disorder.
Treatment for anxiety disorders can include- drugs, psychotherapy, behavior modification, and relaxation training. Another very common disorder is paranoia. Paranoia is a disorder where a person has consistent, fixed, false beliefs, of either persecution or grandeur. Like anxiety, paranoia can appear as a symptom in other disorders, but the false beliefs are often accompanied by hallucinations. In the hallucinations people often see historical figures that are associated with their false beliefs, of either persecution or grandeur.