Thyroid cysts are relatively common in clinical practice. Whether surgery is necessary depends on two factors. On one hand, it depends on whether the cyst is malignant. If the ultrasound reveals small calcifications within the cyst, or other signs of malignancy, then a fine needle aspiration of the thyroid should be carried out for a pathological examination. If the cyst is confirmed to be malignant, surgery is generally recommended. However, if the examination indicates that the thyroid cyst is benign with a low malignancy level, surgery is usually not required. However, if the thyroid cyst is large, affects appearance, causes significant swallowing difficulties or hinders neck movement, surgery can also be considered.