Anxiety

Anxiety is both a mental and physical state of negative expectation. Mentally it is characterized by increased arousal and apprehension tortured into distressing worry, and physically by unpleasant activation of multiple body systems—all to facilitate response to an unknown danger, whether real or imagined.

The cognitive feelings of dread in anticipation of some bad outcome, and physical sensations such as jitteriness and a racing heart are designed for discomfort. Anxiety is meant to capture attention and stimulate you to make necessary changes to protect what you care about. Occasional bouts of anxiety are natural and can even be productive. Anxiety can be considered the price we humans pay for having the ability to imagine the future.