Thyroid nodules are formed due to the proliferation of thyroid tissue into masses, and clinically, these nodules are categorized as either benign or malignant, and as cystic or solid. Generally, cystic nodules are benign. However, a portion of solid nodules are malignant. Therefore, in the early stages, a patient with thyroid nodules might not exhibit any symptoms because the nodules are relatively small. As the thyroid nodules progressively enlarge, for instance, when they grow larger than two or three centimeters, the patient may start feeling discomfort in the neck. Some patients with nodules that grow inward can experience compression of the trachea, leading to difficulties in swallowing and breathing obstruction. Thus, when feeling discomfort in the neck, it is crucial to go to the hospital for an ultrasound to confirm whether thyroid nodules are present.