Post-Traumatic Stress Disorder affects people after terrifying events such as physical or sexual abuse, car accidents, war or natural disasters. Individuals with PTSD may experience depression, flashbacks, nightmares, sleep difficulties, irritability, aggression, violence, and a feeling of detachment or numbness. Symptoms can be triggered by anything that reminds the individual of their trauma.
Behavioral choices can also significantly impact risk, as excessive tobacco or caffeine use can increase anxiety, whereas regular exercise can decrease anxiety. Specific temperament and personality traits also may confer risk of having an anxiety disorder. With regards to temperament, shyness and behavioral inhibition in childhood can increase risk of developing an anxiety disorder later in life. With regard to personality traits, the Five Factor Model of Personality consists of five broad trait domains including Neuroticism, Extraversion, Openness to Experience, Agreeableness, and Conscientiousness. An individual higher on trait Neuroticism or low on Conscientiousness is at a higher risk for all anxiety disorders, and an individual low on trait Extraversion is at a higher risk of developing social phobia and agoraphobia. Some more narrow personality traits have also been found to relate to risk for anxiety, including anxiety sensitivity, a negative or hostile attributional style, and self-criticism. Personality disorders have also been shown to relate to increased risk for anxiety disorders.
Social anxiety disorder (previously called social phobia): People with social anxiety disorder have a general intense fear of, or anxiety toward, social or performance situations. They worry that actions or behaviors associated with their anxiety will be negatively evaluated by others, leading them to feel embarrassed. This worry often causes people with social anxiety to avoid social situations. Social anxiety disorder can manifest in a range of situations, such as within the workplace or the school environment.