Thyroid nodules 20mm*15mm need to be treated depending on the nature of the nodule. If the thyroid nodule is benign, surgery is not required and regular ultrasound examinations of the thyroid gland to observe changes in the nodule are sufficient. If the nature of the nodule changes, or if the nodule grows in size and causes symptoms of tracheal or esophageal compression, such as difficulty breathing or swallowing, surgery is needed. If the thyroid nodule is malignant, surgery is required. If the thyroid nodule is combined with thyroid function abnormality, it also needs to be treated. Combined with hyperthyroidism, it can be treated with methimazole, radioactive iodine and surgery; if combined with hypothyroidism, it can be treated with levothyroxine sodium tablets. Thyroid nodule 20mm*15mm need to go to the hospital, under the guidance of the doctor treatment.