It is a chronic condition characterized by an excessive and persistent sense of apprehension, with physical symptoms such as sweating, palpitations, and feelings of stress. Anxiety disorders are partly genetic but may also be due to drug use including alcohol and caffeine, as well as withdrawal from certain drugs.
There are many different anxiety disorders, including generalized anxiety disorder, obsessive-compulsive disorder, panic disorder, specific phobias, post-traumatic stress disorder (PTSD), and social anxiety disorder.