Which signs are consistent with hyperthyroidism?

Hyperthyroidism is a condition where the thyroid gland produces an excess of thyroid hormones, leading to an increase in metabolic activities. This heightened metabolic state is often associated with various signs and symptoms. Nervousness is one of the classic symptoms of hyperthyroidism, as the elevated levels of thyroid hormones can lead to increased anxiety, irritability, and restlessness.

The body's metabolism is essentially revved up, which can cause individuals to feel on edge or overly stimulated, contributing to feelings of nervousness. This symptom is often accompanied by other signs, such as increased heart rate, sweating, and tremors, all of which stem from the overall heightened state of activity in the body due to excess thyroid hormone.

In contrast, other options like weight gain, constipation, and exophthalmos are not consistent with hyperthyroidism. Weight gain typically occurs in conditions of hypothyroidism, where a sluggish metabolism leads to an increase in body weight. Constipation is likewise common in hypothyroidism due to slowed gastrointestinal motility. Exophthalmos refers to protruding eyes and is a specific symptom often associated with Graves' disease, a common cause of hyperthyroidism, but it is not universally present in all hyperthyroid patients. Thus, nervous