Enlarged thyroid gland may be caused by simple goiter, Hashimoto’s thyroiditis and other diseases, which need to be treated under the guidance of the doctor, such as medication, surgery and so on. 1. Simple goiter: If the goiter produces pressure symptoms, surgical resection is recommended. For slow-growing and asymptomatic patients, regular checkups are not necessary. 2. Hashimoto’s thyroiditis: it can be accompanied by hypothyroidism (hypothyroidism). When accompanied by hypothyroidism, levothyroxine sodium tablets are used to carry out hormone replacement therapy, and the use of prednisone can be considered if the thyroid gland enlarges rapidly and is accompanied by localized pain symptoms. 3. Graves’ disease: This disease can lead to hyperthyroidism (hyperthyroidism), hyperthyroidism needs to be treated with antithyroid drugs, such as propylthiouracil, but also can receive radioactive iodine treatment, surgical treatment. It is recommended to visit a hospital when a goiter occurs and be treated under a doctor’s supervision.