Most thyroid cancers are now microscopic papillary carcinomas, and thyroid cancers may be diagnosed by ultrasound grading (TI-RADS grading) of category 4 or above, and the final diagnosis mainly relies on fine needle aspiration, which is an important tool for thyroid cancer diagnosis. However, studies have shown that needle aspiration does not increase the risk of needle metastasis or distant metastasis in thyroid cancer, so there is no need to worry too much. Only after a clear diagnosis is made can a reasonable treatment be chosen, including thyroid nodule aspiration and, for thyroid cancer with enlarged lymph nodes, puncture of suspected metastatic lymph nodes are important means of thyroid cancer treatment and do not increase the risk of metastasis. Therefore, there is no need to worry too much. Once the thyroid nodule is considered to be malignant, further fine needle aspiration is recommended.