Hyperthyroidism, referred to as hyperthyroidism, is a thyrotoxicosis caused by excessive production of thyroid hormones by the thyroid glands themselves, and its causes include diffuse toxic goiter, nodular toxic goiter, and autonomic hyperfunctioning adenoma of the thyroid gland. Clinical manifestations are mainly caused by excessive circulating thyroid hormones. Symptoms are common: agitation, irritability and insomnia, palpitations, fatigue, fear of heat, excessive sweating, weight loss, hyperphagia, increased stool frequency or diarrhea, scanty menstruation in women, etc., and may be accompanied by signs such as goiter, eye signs and skin signs. If hyperthyroidism is not treated in time, it can develop into serious illnesses such as thyroid crisis and thyrotoxic heart disease. Thyroid cancer is the most common malignant tumor of the thyroid gland, which originates from the epithelial cells of the thyroid gland. Most thyroid cancers originate from follicular epithelial cells. Thyroid cancers can be classified into differentiated and undifferentiated types, among which differentiated thyroid cancers are the most common in clinical practice, accounting for more than 90% of all thyroid cancers, and their clinical manifestations are mostly thyroid nodules. The cause of thyroid cancer is not well understood and may be related to dietary factors (high iodine or iodine deficiency diet), history of radiation exposure, genetic factors, or may evolve from benign thyroid disease.