Enlargement of the right lobe of the thyroid gland refers to a significant increase in the volume of the right side of the thyroid gland. The common clinical causes are mainly the following: a. The right lobe of the thyroid gland is accompanied by nodular hyperplasia, which can cause significant hyperplasia of the thyroid gland as the volume of the nodule continues to increase, and for larger thyroid nodules, it may cause compression symptoms of the trachea and esophagus. If the hyperplastic nodules become cancerous, patients are advised to have surgery to avoid the spread of tumor cells, which may cause serious complications. In case of hyper- or hypothyroidism, the right lobe of the thyroid gland can be enlarged. At this time, patients can take oral medication to maintain the stability of thyroid hormone level in the body, so that the enlarged right lobe of the thyroid gland can gradually return to normal without surgery.