The three most common thyroid disorders would be hyperthyroidism, hypothyroidism, and thyroiditis. 1. Hyperthyroidism: excessive thyroid hormones in the blood circulation, most commonly seen in Graves’ disease, mainly manifested as irritability and anxiety, agitation, palpitations, arrhythmia, emaciation, hyperphagia, diarrhea and other symptoms. 2. Hypothyroidism: a kind of low metabolic syndrome caused by insufficient synthesis, secretion or biological effect of thyroid hormone, the causes of which mainly include Hashimoto’s thyroiditis, taking antithyroid drugs, after thyroidectomy, after iodine 131 treatment, congenital thyroid deficiency and endemic iodine deficiency. 3. Thyroiditis: It is a thyroid disease with inflammation as the main manifestation, which can be accompanied by different degrees of systemic reactions, and the causes include infectious and non-infectious, and its clinical manifestations are different. Thyroid disorders should be treated promptly.