Hyperthyroidism patients usually have large neck, but not all patients with hyperthyroidism will have enlarged neck, and a few patients will not have enlarged neck, of course, neck enlargement is not hyperthyroidism, so thyroid function should be checked when neck enlargement occurs. Thyroid enlargement can be divided into 3 degrees: 1 degree is invisible, but the swollen thyroid can be touched; 2 degree refers to visible thyroid enlargement, but the scope of the enlargement does not exceed the sternocleidomastoid muscle; 3 degree refers to the swollen thyroid exceeds the sternocleidomastoid muscle. For patients with hyperthyroidism, there are three treatment methods: drugs, iodine 131 and surgery. These three methods can cure hyperthyroidism, and each has its own advantages and disadvantages. It is necessary to choose an appropriate method according to the characteristics of patients and their own needs.