While experiencing feelings of anxiety from time to time is normal, these emotions, when they become extreme and start interfering with everyday activities can be symptoms of an anxiety disorder.
Anxiety disorders are the most common mental disorders in the United States. Anxiety symptoms vary across individuals, but include both psychological and physical reactions to anticipation of a threat. It is estimated that only about 40% of those suffering from an anxiety disorder receive treatment, even though the disorders are highly treatable. Read more in Verywell.