Looking for anxiety disorder treatment in Brentwood, TN? Anxiety disorders are the most common mental disorder in the United States, affecting 18.1 percent of adult Americans – nearly 40 million. If you’re anxious, it’s not uncommon to have feelings of fear, worry, and tension and looking for help. But eventually, they disappear, or you learn to manage them. For many others, such thoughts can be disabling, leading to sudden panic attacks, physical ailments, and other problems that interfere with how you function every day.