The neck is common in thyroid-related diseases, mainly including: 1, goiter: the chance of occurrence is low, iodized salt is now more popular, less iodine deficiency; 2, hyperthyroidism: can be a diffuse enlargement of the thyroid gland, often accompanied by other hyperthyroid symptoms, such as increased food intake, thin body shape, fear of heat and easy sweating performance; 3, thyroid tumor: can directly lead to the enlargement of the thyroid gland, tumors include benign and malignant, no pressure does not affect the appearance of the situation is recommended to observe, if the diagnosis of malignant lesions should be promptly targeted for treatment.