When we are anxious, however, we often don't know why. We sense that something is wrong or about to go wrong, but we don't even know what it is. Anxiety like all emotions has both physical and psychological features. If anxiety persists these symptoms can get worse and lead to more severe illnesses. Sometimes there is insecurity, reluctance to try anything new, and even a fear of leaving home or going to work.
Anxiety is very common, so there can be many causes.
Other related problems People who suffer from anxiety may also experience phobias or feelings of terror, dread or panic when confronted with the feared object, situation or activity. Social phobia is a fear of a situation in which you can be watched by other people, like when eating in public or giving a speech. Simple phobia is the fear of specific objects or situations that cause terror, like the fear of snakes or the fear of closed spaces. Agoraphobia is the fear of being alone or in a public place that has no escape route like a crowded store or a public bus. Panic disorders are related to anxiety in that you may experience intense, overwhelming terror for no apparent reason.