What is a common physical symptom of anxiety?

A common physical symptom of anxiety is loss of appetite. Anxiety often triggers the body's fight-or-flight response, which can lead to various physical symptoms, including changes in appetite. The stress and tension associated with anxiety can disrupt normal eating habits, resulting in a decreased desire for food. Individuals may also experience nausea or gastrointestinal distress, contributing to this reduced appetite.

In contrast, increased energy levels and persistent happiness are generally not indicative of anxiety; they are more likely associated with positive emotional states or conditions like mania. The inability to concentrate does relate to anxiety; however, it is considered more of a cognitive symptom rather than a physical one. Thus, loss of appetite stands out as a distinctive physical manifestation of anxiety, highlighting the impact of emotional stress on physiological responses.