Benign thyroid tumors grow slowly, have clear borders, and generally do not metastasize. On the other hand, malignant thyroid tumors grow rapidly, have unclear boundaries, and can develop distant metastases. Benign thyroid tumors generally grow slowly, can form a complete envelope, and the boundary with the surrounding tissue is relatively clear. Calcification rarely occurs within benign tumors, and benign tumors often grow expansively and generally do not metastasize. Malignant tumors of the thyroid gland grow more rapidly, and the boundaries with the surrounding tissues are not clear, and even adherence with the surrounding tissues occurs. Malignant tumors often show infiltrative growth and can metastasize through the bloodstream, as well as through lymph node metastasis or implantation metastasis. Malignant tumors often have obvious calcification inside. When thyroid tumors appear, it is recommended to seek medical treatment in time, go to the hospital for ultrasound, CT and pathological tissue biopsy and other examinations to clarify the benign and malignant nature of thyroid tumors, and then combine with the doctor’s recommendations for treatment.