More than 40 million adults in the United States live with an anxiety disorder, and fewer than half receive treatment. The prevalence is rising, but what is anxiety, and what is causing it? This special edition of Health examines the difference between feeling anxious and having an anxiety disorder. It includes a deep dive into this mental illness, including how anxiety affects the body, signs of a panic attack, pet therapy, and how to ask for help. Also included are research-backed remedies for relieving anxiety, as well as exercises to promote calm and overall well-being.