However, people with anxiety disorders often have strong, excessive, and persistent worries about everyday situations. Generally, anxiety disorders consist of repeated episodes of sudden intense anxiety and feelings of fear, which can peak into much intense panic attack episodes. These feelings of anxiety and panic can interfere with daily activities, are difficult to control, are out of proportion to the actual danger, and last for a long time. You may avoid some places or situations to prevent these feelings. Symptoms may begin in childhood or adolescence and continue into adulthood.