What is Anxiety? Expand Anxiety is a word we use to describe feelings of unease, worry and fear. It incorporates both the emotions and the physical sensations we might experience when we are worried or nervous about something. Although we usually find it unpleasant, anxiety is related to the ‘fight or flight’ response – our normal biological reaction to feeling threatened. We all know what it’s like to feel anxious from time to time. It’s common to feel tense, nervous and perhaps fearful at the thought of a stressful event or decision you’re facing – especially if it could have a big impact on your life. For example:•sitting an exam•going into hospital•attending an interview•starting a new job•moving away from home•having a baby•being diagnosed with an illness•deciding to get married or divorced In situations like these it’s understandable to have worries about how you will perform, or what the outcome will be. For a short time you might even find it hard to sleep, eat or concentrate. Then usually, after a short while or when the situation has passed, the feelings of worry stop.