Thyroid nodule more than 1cm generally means that the maximum diameter of the nodule is found to be more than 1cm in neck ultrasound. It is recommended to observe whether the boundary of the nodule is clear, whether there is a peritoneum, whether there is calcification within the nodule, etc., and to do pathological biopsy to clarify the benignness or malignancy of the nodule if necessary. Risk factors for malignancy of thyroid nodules include uneven internal echogenicity, unclear borders, absence of or incomplete envelope, calcification within the nodule, attenuated echogenicity at the back of the nodule, abundant blood flow signals, and aspect ratios greater than one. It is not possible to determine the benign or malignant nature of thyroid nodules based on the fact that they are more than 1cm in size, but the size of the nodule is an important basis for deciding whether or not to perform a puncture biopsy, and it is also an important assessment indicator during the follow-up process, so it is recommended that you consult with your doctor and evaluate your condition comprehensively in conjunction with the results of other tests. Patients with thyroid nodules are advised to seek prompt medical attention.