Thyroid nodule grade 3 is not necessarily malignant. Thyroid nodule grade 3 is a benign lesion with less than 2% chance of malignancy. Thyroid nodules are generally categorized into 6 grades, and the higher the grade, the higher the risk of thyroid cancer. Thyroid nodules graded at or below grade 3 have a higher probability of being benign nodules, grade 4 or above may be malignant, and grade 6 can be determined to be malignant. Thyroid nodule category 3 can be treated with follow-up observation or surgery. When the patient does not show obvious abnormalities, conservative treatment can be used, with regular review and improvement of thyroid ultrasound and other examinations to monitor whether there is an increase or enlargement of the nodules, and once there are obvious changes, it is necessary to consult a doctor for diagnosis and treatment in a timely manner. When the patient has thyroid nodule enlargement or malignant changes, it is recommended to consult a doctor in time, and the professional doctor will judge whether it is necessary to carry out surgical resection. If the patient belongs to the category of thyroid nodules 3, it is recommended to seek timely medical treatment and follow the doctor’s instructions.