Anxiety is a very uncomfortable emotional state in which there is a feeling of apprehension and nervousness. A person may have a sense of impending doom and become fearful that something bad is going to happen. Anxiety is associated with physical symptoms of arousal. These symptoms may include sweating, trembling, heart palpitations, pounding or racing heart, shortness of breath, dizziness, feeling jittery or on edge.
Anxiety exists on a continuum, and having some level of anxiety is normal and adaptive. For example, a mild level of anxiety before an exam or a performance may help a person prepare for these events.