Thyroid cysts refer to fluid-containing sac-like formations found in the thyroid gland. For their treatment, thyroid cysts are a type of benign tumor of the thyroid. In imaging studies, if the nodule's diameter is less than one centimeter, it usually presents no clinical symptoms or signs. Regular follow-ups with thyroid ultrasonography and thyroid function tests are advised. If there is no trend of enlargement, continued observation without surgical intervention can be appropriate. However, if the nodule's diameter is greater than one centimeter, or if it is located on the surface of the thyroid, the local skin may show a protrusion or bulge, and the cyst may continue to grow, pressing on the trachea or even the esophagus, causing symptoms such as chest tightness, difficulty breathing, a feeling of swallowing, and obstruction. It is important to seek medical attention in a timely manner, undergo a fine needle aspiration biopsy if necessary, and surgical treatment may be required if needed.