Anxiety symptoms include poor attention or lack of focus, as well as distractibility. Excessive anxiety or concern that things will go wrong. Anxiety can be felt mentally by having thoughts that keep you worried or concerned, and physically by feeling anxious or afraid. There are many different kinds of anxiety disorders, but they all involve excessive fear that affects your daily life. An inability to focus is just one aspect of anxiety. It is also possible to have anxiety without being aware of it, because it manifests itself in behaviors rather than feelings. For example, if you are anxious about something, you may spend a lot of time thinking about it or trying not to think about it, which can affect your school work or social interactions. In addition to being able to focus, people with anxiety tend to worry about everything from small inconveniences to major problems. They may worry about losing their job, getting sick, or making a mistake. They may also worry about these things happening to others or try to prevent them from happening. Worrying like this can cause stress, which can lead to a lack of concentration. People with anxiety often feel restless as well. They may have trouble sitting still and may need frequent breaks during class or work sessions.