Thyroid category 3 symptoms are not too serious. Thyroid category 3 refers to the degree of enlargement of thyroid nodules, which are benign nodules and do not affect normal life safety. Treatment is required. If hyperthyroidism is a complication, timely treatment with methimazole or radioactive iodine is indicated. If the enlarged thyroid gland compresses the trachea and esophagus causing breathing difficulties, surgical removal is required. If you want to cure it, you can choose surgery for local excision to avoid further enlargement of the thyroid gland and thyroid cancer. After surgery, you will need to take thyroid hormone medication to maintain your body’s basal metabolism, depending on your symptoms. All thyroid nodules are benign to prevent monitoring of cell differentiation causing cancer.