Thyroid category III should refer to a grade III thyroid nodule, which is a possibly benign nodule, and an asymptomatic grade III thyroid nodule is usually not serious. According to the thyroid TI-RADS classification, a thyroid nodule grade III is a possibly benign nodule with a malignancy rate of <2%. Asymptomatic grade 3 thyroid nodules are generally not serious, while larger nodules with compression symptoms are more serious. Asymptomatic and thyroid function normal thyroid nodule class III patients are recommended for regular review, do not need special treatment, if in the process of review there is a rapid increase in thyroid nodules and other malignant tendency is recommended to carry out a biopsy of the thyroid nodule clear. Patients diagnosed with Class III thyroid nodules can go to the hospital and ask the doctor to make a judgment based on the specific situation.