Thyroid nodules are lumps in the thyroid gland that move up and down with the thyroid gland in response to swallowing movements and are a common clinical condition that can be caused by a variety of etiologies. Thyroid nodules can be divided into solitary and multiple nodules, which vary in size, location, texture, function and their clinical significance. It is not hyperthyroidism, but it still needs to be treated. Thyroid nodules can be broadly classified as malignant lesions, benign nodules and cystic lesions. Thyroid nodules can be seen in both men and women of all ages, but are more common in middle-aged women. Thyroid nodules can be solitary or multiple, with multiple nodules having a higher incidence than solitary ones, while solitary nodules have a higher incidence of thyroid cancer compared to multiple nodules. Thyroid nodules are divided into two categories: benign and malignant, with benign nodules accounting for the majority and malignant nodules for less than 1%. Depending on the pathology of the nodules, they can be classified as: nodular goiter, inflammatory nodules, toxic nodular goiter, thyroid cysts, thyroid tumors, etc. If a nodule is found in the thyroid gland, seek immediate medical attention. Initial examination: thyroid ultrasound, thyroid function, etc.