Patients with thyroid adenoma are mostly women, often under 40 years of age, and usually have a single nodule in the thyroid gland. The course of the disease is slow, mostly from several months to several years or even longer. Patients are found with slight discomfort or without any symptom and are found to have a neck mass. 2.Thyroid tumor is very insidious, and in the early and middle stage of the disease, patients may not have any conscious symptoms. With the gradual development of the disease, discomfort and stuffiness in the anterior neck area may appear, and then the lower part of the anterior neck area may be found to be enlarged and elevated, or the tumor may be found on its own. If the disease is not treated in time, the patient may experience shortness of breath, dyspnea, hoarseness, dysphagia and dysphagia when the thyroid cancer metastasizes to the lung, irritating cough and chest pain may appear. 3. Huge tumor may produce signs of pressure on adjacent organs, but does not invade these organs. In a few patients, the tumor will suddenly increase in size due to intra-tumor bleeding, accompanied by distension and pain; some masses will gradually absorb and shrink, while some may develop cystic changes. In patients with a long history, the tumor is often hardened by calcification; some may develop into a functionally autonomous adenoma and cause hyperthyroidism.