Okay, simply. Anxiety disorders are an imbalance between excitatory and inhibitory neurotransmitters in the brain.
Anxiety. Excessive worrying, if you are asking about generalized anxiety disorder. But there are other types of anxiety disorders, including obsessive compulsive disorders; phobias; panic disorder; social phobia and post-traumatic stress disorder. Each has different presentations. You can visit this website for more information http://www. Ncbi. Nlm. Nih. Gov/pubmedhealth/pmh0003695/.