Thyroiditis can cause enlarged lymph nodes, with acute thyroiditis and subacute thyroiditis being more likely to cause lymph node enlargement. Acute thyroiditis is usually caused by bacterial infections, and lymph node enlargement is usually caused by submandibular inflammation or tonsillitis, but there is no need to worry too much, and most of the lymph node enlargement will disappear after antibiotic treatment. Subacute thyroiditis can also cause lymph nodes to swell, mainly because subacute thyroiditis is a viral infection, after being infected by the virus, it will lead to an immune response in the lymph nodes, triggering the lymph nodes to appear reactive hyperplasia, so the lymph nodes will appear to be enlarged, and then you need to consult a doctor in time, and after symptomatic treatment, the lymph nodes will be enlarged in the majority of cases will be subsided. If the patient suffers from thyroiditis, it is recommended to go to the regular hospital for examination, to clarify the cause of the disease, symptomatic treatment, so as not to delay the condition.