There are three main types of phobias: specific phobias, social phobias, and agoraphobia. Specific phobias involve an irrational fear of a specific object or situation, like heights or insects. Social phobias involve a fear of social situations where one may be judged. Agoraphobia is a fear of being in places away from the safety of home or where escape may be difficult, like crowds. Phobias are treated with therapy and medication to help reduce anxiety and change irrational thoughts that cause the fears.