Thyroid enlargement and neck enlargement can be seen in iodine deficiency, hyperthyroidism, hypothyroidism and so on. Iodine deficiency should consume iodized salt and iodized seafood; hyperthyroidism should be treated with methimazole, radioactive iodine 131, and surgery; hypothyroidism should be treated with levothyroxine sodium tablets. 1. Iodine deficiency: some goiter is caused by iodine deficiency, at this time should be supplemented with iodine, such as consuming iodized salt, kelp, seaweed, marine fish and other iodine-containing foods. 2. Hyperthyroidism: there can be goiter, should be given methimazole, propylthiouracil and other antithyroid drugs; radioactive iodine 131 treatment; for the obvious enlargement of the thyroid gland produces dyspnea, dysphagia and other symptoms of compression, it should be surgical treatment. 3. Hypothyroidism: there can be goiter, which is due to the insufficiency of thyroid hormone, negative feedback leads to excessive secretion of thyroid stimulating hormone, which acts on the thyroid gland and leads to thyroid hyperplasia and enlargement. Levothyroxine sodium tablets should be given to reduce goiter. People with goiter and enlarged neck should go to the hospital in time and be treated under the guidance of the doctor.