Thyroid enlargement can be divided into two kinds: diffuse enlargement and limited enlargement. Diffuse enlargement refers to the uniform enlargement of both sides of the thyroid gland, which is usually not a tumor, while limited enlargement is often due to the growth of a tumor on the thyroid gland, therefore, when you find that your thyroid is enlarged, you should firstly determine the shape and characteristics of it. Patients with thyroid pain should first determine the extent of their pain. Intense pain is usually due to various inflammatory diseases of the thyroid gland, such as acute suppurative thyroiditis subacute thyroiditis, both of which must be treated promptly. Mild pain is not specific, because many thyroid diseases can cause this symptom, and the diagnosis can only be confirmed through formal examination. Tests: Internal palpation, mainly to check whether the swelling in the neck originates from the thyroid gland. Tests: Laboratory tests to find out whether there is any abnormality in the function of the thyroid gland and to help clarify the nature of the thyroid swelling. Examination: fine needle aspiration of the swelling to clarify the nature of the thyroid swelling. Examination items: thyroid ultrasonography to detect the morphology, size, number of thyroid masses and their position in relation to the carotid artery sheath; to determine whether the masses are cystic or solid; to clarify the condition of the lymph nodes in the neck. Items to be examined: Frontal and lateral X-ray examination of the neck, which can understand the extent of the tumor, different calcification images and the relationship with the trachea and esophagus. Examination items: CT and magnetic resonance imaging (MRI) of the neck can clearly show the size and shape of the thyroid tumor and its relationship with the trachea, esophagus, blood vessels and even nerves, so as to fully define the extent of invasion of the cancer, and provide scientific basis for the implementation of surgery.