The symptom of hyperthyroidism is goiter. Goiter does not necessarily have hyperthyroidism. Goiter is the same sign of most thyroid diseases, but goiter is not always hyperthyroidism. Because about 10% of patients with hyperthyroidism have no goiter, whether the thyroid gland is enlarged or not can not be used as an essential index to judge hyperthyroidism. In addition to hyperthyroidism, there are endemic goiter, adolescent goiter, pregnancy goiter, thyroid adenoma, cancerous goiter, acute thyroiditis, subacute non-suppurative thyroiditis, chronic lymphocytic thyroiditis, chronic aggressive fibrous thyroiditis, thyroid tuberculosis, goiter and other thyroid inflammatory diseases that can cause goiter. Therefore, if you find goiter, you should go to the hospital to ask a specialist for examination and do relevant experiments.