Anxiety sensitivity refers to a person's tendency to fear anxiety-related symptoms (for example, increased heart rate, sweating, muscle tension, headaches) due to the belief that there will be some negative physical, social, or mental outcome as a result of having those symptoms. For example, a person may fear having an increased heart rate because they believe that it will increase their risk for a heart attack. Another person may fear being anxious because they think that others will view them in a negative light. Finally, someone might fear having the anxiety symptom of having a headache or difficulties concentrating because they think this is a sign that they are "going crazy."

