Thyroid tumors are usually said to be benign tumors and are most common in women under the age of 40. Since thyroid tumor can cause hyperthyroidism and has certain malignant potential, its harm should not be underestimated. Performance: it can be gentle or violent Benign thyroid tumors are mostly seen as isolated thyroid nodules, and a few are multiple nodules. The course of the disease is slow, clinically there can be no self-conscious symptoms, most in a few months to a few years. The course of the disease is slow, clinically there can be no self-conscious needle symptoms, most in a few months to a few years, due to a slight discomfort or the mass reaches more than 1cm or even larger and found. Most of them are found in females, and patients often have a long history of thyroid nodules. Early stage of the disease is asymptomatic or only have mild panic, lethargy, and fatigue, and with the development of the disease, the patients show symptoms of thyrotoxicosis, and most of them show symptoms of hyperthyroidism, and hyperthyrotoxic crises can occur in some cases. Some thyroid tumors may become cancerous. The possibility of cancer should be considered in the following cases: 1. Rapid enlargement of the tumor during menstruation. 2. Restricted or fixed movement of the tumor. 3. The appearance of hoarseness, dyspnea and other compression symptoms. 4. The tumor is hard and solid with rough and uneven surface. 5.Enlarged lymph nodes in the neck. The first thing you need to do is to find out what you want to do: ultrasound can clearly identify the thyroid lumps belonging to the cystic or substantial, ultrasound ultrasound can also observe the blood flow of the lumps, so as to diagnose benign and malignant tumors to provide a reference to the rich flow of malignant changes may be possible. Regardless of benign and malignant tumors, the thyroid 131 iodine rate is mostly normal, and functionally autonomous thyroid tumors can be high. Thyroid tumors and a few thyroid carcinomas can be manifested as hot nodules or warm nodules, while thyroid cysts, adenomatous changes of the thyroid gland or internal hemorrhage can be manifested as cool nodules or cold nodules, which usually have clear contours and regular borders.