The manifestation of thyroid cancer metastasis mainly depends on the site of metastasis, which is commonly found in neck lymphatic metastasis, lung metastasis, bone metastasis or esophageal metastasis. Common clinical manifestations include neck enlargement and pain, coughing and hemoptysis, chest tightness and shortness of breath, joint pain, limitation of movement, difficulty in swallowing and so on. Due to the different parts of the metastasis, the performance is also different. 1. Neck lymph node metastasis: if thyroid cancer has neck lymph node metastasis, the main manifestations are neck enlargement, pain, hard lumps in the neck by touching with hands, and it may also lead to hoarseness, speechlessness and difficulty in swallowing. 2. Lung metastasis: If thyroid cancer has lung metastasis, the main manifestations are coughing with phlegm, chest tightness and shortness of breath, etc., and hemoptysis in serious cases. 3. Bone metastasis: If thyroid cancer has bone metastasis, it manifests as pain in joints, restricted movement and poor transportation. 4. Esophageal metastasis: If thyroid cancer has esophageal metastasis, it will manifest as swallowing obstruction, difficulty in eating, easily affecting appetite, and burning sensation in the upper abdomen, etc. If thyroid cancer has esophageal metastasis, it will manifest as pain in the joints, limitation of movement, and poor mobility. Once the above symptoms or other discomforts occur, it is recommended to go to regular hospital for treatment as soon as possible in order to avoid delaying the condition if thyroid cancer metastasis is suspected.