A hypoechoic area in the thyroid gland is more likely to be due to a nodular goiter, or a cyst in the thyroid gland. This may be due to an imbalance in thyroxine metabolism and secondary hyperplasia of the thyroid follicles. Patients may also present with a swelling in the front of the neck, discomfort when swallowing, and painful symptoms. There are also many patients who do not have clinical manifestations but are detected during a health check-up. Patients with no symptoms can be temporarily observed for regular follow-up and review. If there is a significant sensation of pressure and gas, prompt surgical treatment is needed as an option to remove the lesion. In addition, surgery is also the main treatment for multiple nodular goiters that are also prone to secondary hyperthyroidism. After surgery, it is also important to adjust the diet and monitor changes in nail function.