The main differences between lymph nodes and thyroid nodules are as follows: 1. The onset of thyroid nodules and the cause of thyroid disease are not clear yet, while the onset of lymph nodules is in the lymph nodes and the nature of the disease is usually infectious, or reactive hyperplastic lymphadenitis or malignant metastases. 2. If the nodule is enlarged and causes symptoms of pressure or suspected malignancy, surgery can be considered. If the nodule is a bacterial infection or lymphadenitis, anti-infective symptomatic treatment can be given. If the nodule is a malignant metastasis, radical resection of the tumor and lymph node dissection are required for the primary tumor. These are the main differences between thyroid nodules and lymph nodules. Patients who suffer from these diseases are advised to go to a regular hospital for relevant examination and symptomatic treatment in a timely manner.