Hyperthyroidism is the abbreviation of hyperthyroidism, hyperthyroidism patients may become thinner neck after cure. Hyperthyroidism patients appear neck thickening, according to the degree of enlargement of the thyroid gland is divided into three degrees, one degree of enlargement when the appearance is not visible, but can be touched to the enlargement, two degrees of enlargement can be seen and can be touched, but the enlarged thyroid tissue has not exceeded the medial edge of the sternocleidomastoid muscle, the third degree of enlargement when the thyroid gland is significantly enlarged, exceeding the lateral edge of the sternocleidomastoid muscle. When the thyroid gland is significantly enlarged in hyperthyroidism patients, tracheal or even esophageal compression symptoms may occur, such as obstructed breathing and swallowing movements. Generally after surgical treatment or radioactive iodine treatment, the thyroid gland will become smaller and the symptoms of thick neck will subside at this time. Patients with hyperthyroidism should be diagnosed and treated under the guidance of a professional doctor, and should not use medication or treatment on their own.