Follicular thyroid cyst is a type of thyroid cyst and is a very common disease of the thyroid gland. The pathogenesis may be related to chronic inflammatory stimulation, endocrine hormonal disorders and long-term irritation. Follicular thyroid cysts are cystic masses containing large amounts of fluid, which generally grow slowly and take a long time to treat. It is recommended that patients go to a specialist hospital to have the secretion of the thyroid gland checked by ultrasound. Most follicular thyroid cysts are benign, but some may be malignant, and if they are malignant, they require aspiration or surgery. Follicular thyroid cysts whose sites become large usually have compression, sometimes leading to difficulty breathing and swallowing. It can also cause coughing and hoarseness due to pressure on the trachea, esophagus and nerves. It is important to treat follicular thyroid cysts in a timely manner and not to allow them to deteriorate, which may lead to abnormal thyroid function.