This document discusses anxiety, including its definition, types, causes, symptoms, and treatments. There are several types of anxiety disorders such as generalized anxiety disorder, panic disorder, social anxiety disorder, obsessive-compulsive disorder, and post-traumatic stress disorder. Causes can include genetics, brain chemistry, life stressors, and certain drugs. Symptoms vary but include physical sensations as well as social and cognitive effects. Treatments include medications, psychotherapy, and alternative therapies such as exercise, meditation, and aromatherapy.