There are many types of anxiety disorders that include panic disorder, obsessive compulsive disorder, post traumatic stress disorder, social anxiety disorder, specific phobias, and generalised anxiety disorder.
Anxiety is a normal human emotion that everyone experiences at times. Many people feel anxious, or nervous, when faced with a problem at work, before taking a test, or making an important decision. Anxiety disorders, however, are different. They can cause such distress that it interferes with a person's ability to lead a normal life.