Anxiety disorders are the most prevalent mental health issues worldwide and can have significant detrimental effects on people’s quality of life and daily functioning. Nurses in a range of healthcare settings are likely to encounter people with various anxiety disorders, so it is essential that they have adequate knowledge and understanding of these conditions. This article explores the development of anxiety, before outlining the aetiologies and symptoms of common anxiety disorders. The author also provides an overview of some of the treatments available for anxiety disorders and explains the nurse’s role in supporting those affected by these conditions.