There are many reasons for left supraclavicular lymph node enlargement, the common one is still benign lymph node hyperplasia, in addition, there may be acute and chronic lymphadenitis. Of course, we can’t rule out malignant tumors, such as malignant lymphoma or distant metastasis caused by stomach cancer or lung cancer. It may also be caused by thyroid cancer or nasopharyngeal cancer. If the lymph nodes are enlarged due to inflammation, usually there will be obvious pain, soft texture and mobility. Lymph node enlargement caused by malignant tumors is usually painless, hard and adherent to the local area.