Fine needle aspiration is an invasive examination, but it is currently an important and most efficient method for assessing benign and malignant conditions, generally conducted under ultrasound guidance. Thyroid nodule aspiration does not cause much pain, similar to that of an injection. Anesthetics are used during the procedure, so the pain is not very noticeable. However, as the effect of the anesthetic wears off, there may still be some pain at the puncture site, but the patients do not need to carry a heavy psychological burden.