This article provides an overview of anxiety, discussing its prevalence, causes, and effects. It explains that anxiety is a natural response to risky situations but can become problematic when it persists in safe environments. The article explores the brain mechanisms involved in anxiety and the role of interoception. It also examines the genetic and environmental factors that contribute to anxiety, including the influence of gut microbiome and caffeine intake. The article discusses the rise of anxiety disorders in high-income countries, potentially influenced by the COVID-19 pandemic, economic stressors, and political stressors. It highlights the increasing prevalence of childhood anxiety, possibly driven by climate change, social media, and smartphones. Effective treatments for anxiety in young people, such as cognitive behavioral therapy, are available. The article also addresses eco-anxiety, emphasizing that it is a rational response to ecological breakdown rather than a mental health condition. It suggests coping strategies for eco-anxiety and explores the benefits of anxiety, such as improved problem-solving abilities and health outcomes. The article concludes by providing tips on how to support someone experiencing anxiety. [Extracted from the article]