Hyperthyroidism is the abbreviation of hyperthyroidism. The thick neck caused by hyperthyroidism can be thinned by medication, surgery and iodine radiation therapy. 1. Drug treatment: usually the use of anti-thyroid drugs, including methimazole, propylthiouracil, etc., can reduce the body’s thyroid hormone levels to a reasonable range, and when the hormone levels fall to normal, the symptoms of thick neck can be relieved to a certain extent. 2. Iodine radiation therapy: Iodine 131 treatment of hyperthyroidism is mainly through the destruction of thyroid tissue, resulting in a reduction in the synthesis of thyroid hormones, and ultimately play a role in the treatment of hyperthyroidism, to be hyperthyroidism is under control after the neck may also be able to relieve the thick. 3. Surgery: Surgery can be performed on people with significantly enlarged thyroid glands and moderate-to-severe hyperthyroidism. Surgery to remove part of the thyroid tissue can improve the condition of a thick neck. It is recommended to go to the hospital and cooperate with your doctor when you have a thick neck due to hyperthyroidism.