Thyroid nodules are more common in adults. About 15;-20;% of adults over 30 years of age can see thyroid nodules under ultrasound, and about 40;% of older adults over 60 years of age have thyroid nodules if an ultrasound is performed. Not all thyroid nodules require surgery. About 10-15%; of all thyroid nodules have the potential to be malignant or are follicular adenomas, which require surgical removal. The determination of whether a thyroid nodule requires surgery can be based on the following: 1. Medical history: Thyroid nodules grow rapidly, or previous nodules suddenly increase in size within a short period of time. History of previous radiation exposure to the thyroid area or neck during infancy and childhood, family history of thyroid cancer, especially with-like cancer. 2.Symptoms: localized pressure, or combined with hoarseness, difficulty in swallowing, etc. Even difficulty in breathing. 3.Examination: Thyroid nodules are hard and poorly mobile. There are enlarged lymph nodes in the neck. 4. Ultrasound: Irregular thyroid nodules with unclear borders, solid or cystic, calcifications in the nodules, and abundant blood flow in the nodules. Enlarged lymph nodes in the neck. 5.Laboratory tests: elevated thyroid immunoglobulin and elevated calcitonin (medullary carcinoma). 6.Fine needle aspiration cytology: it is a more accurate method, the accuracy rate can reach 85%;. Puncture under ultrasound guidance can increase the accuracy rate.