Thyroid nodules and thyroid cysts are not the same. They are generally different in terms of imaging and nature. On the imaging examination, the cysts are generally in liquid form, while the contents of thyroid nodules are in solid state; in terms of nature, thyroid cysts are generally benign lesions, while thyroid nodules can be benign or malignant. 1. Imaging examination: Generally, the shape of the thyroid gland can be determined by ultrasonography, through which it can be seen that the contents of thyroid cysts are in the form of liquid, while the contents of thyroid nodules are in the form of solid. 2. Nature: thyroid cysts are benign lesions, thyroid nodules are divided into malignant and benign nodules, clinically most of the thyroid nodules are benign, and a small number of them are malignant nodules. When you feel swelling and other discomfort in your neck, it is important to go to the hospital as soon as possible for treatment.