Which symptom is NOT typically associated with hyperthyroidism?

In the context of hyperthyroidism, symptoms commonly arise due to the increased metabolic rate caused by elevated thyroid hormone levels. Weight loss, proptosis (which is an eye-related symptom often seen in Graves' disease, a common cause of hyperthyroidism), and anxiety are all associated with this condition due to the heightened sympathetic nervous system activity and metabolic demands.

Lethargy, on the other hand, is generally not a symptom of hyperthyroidism. Patients with hyperthyroidism usually experience increased energy levels, restlessness, and signs of agitation rather than lethargy. The overactivity of the thyroid can lead to symptoms that are closely aligned with increased energy and anxiety rather than feelings of tiredness or fatigue, which are more commonly associated with hypothyroidism. Thus, the correct identification of lethargy as not typically associated with hyperthyroidism reflects an understanding of the condition's symptoms and their physiological basis.