Hyperthyroidism is a disease that causes symptoms.

Hyperthyroidism is an endocrine disease that causes a series of symptoms due to elevated thyroid hormone levels. Patients may experience insomnia, hyperhidrosis, fear of heat, agitation, anxiety, palpitations, weight loss, arrhythmia, hyperactivity, increased eating, exophthalmos, goiter and other symptoms. In severe cases, heart failure may occur.