Thyroid 4b generally refers to thyroid nodule 4b, which belongs to suspected malignancy, with a malignancy risk of 10%~50%, and can be determined by puncture biopsy to determine the benign or malignant nature, once diagnosed as malignant thyroid nodules are more serious, while if they are benign, they are not considered serious. According to the TI-RADS classification of thyroid nodules, thyroid nodule 4b is a suspected malignant nodule with a risk of malignancy of 10%~50%, at this time, it is necessary to consider performing a puncture biopsy of the thyroid nodule, which will be judged based on the biopsy results. If the biopsy result shows malignant thyroid nodule, then it is more serious and needs to be considered for surgical treatment; if the biopsy result shows benign thyroid nodule, then it is not serious and can be observed for the time being. Patients diagnosed with Thyroid Nodule 4b should actively cooperate with the doctor for treatment.