During thyroid puncture biopsy, anesthesia is required. When a thyroid puncture is performed, a thin needle is used to enter the thyroid nodule to take a sample under the guidance of ultrasound, and in the process of taking the sample, repeated poking and stabbing is required to obtain the cells that are more valuable for detection until some of the cells and tissues are aspirated. or malignant, and whether there is a possibility of cancer. The procedure may cause intense pain, which is difficult for patients to tolerate without anesthesia, and the patient may move due to the pain, which may lead to accidents during the procedure. Therefore, before the puncture surgery, local anesthetic drugs need to be applied to the patient’s neck so that the surgery can be performed smoothly.