Anxiety is a natural response to stress or danger that affects everyone at some point in their lives. It is a feeling of worry, fear, or unease that can range from mild to severe and can manifest in different ways such as physical, emotional, or cognitive symptoms. Common causes of anxiety include work, finances, health, relationships, and major life changes. While some anxiety is normal, excessive and prolonged anxiety can interfere with daily activities and negatively impact mental and physical health.