Metastasis of papillary thyroid cancer is usually based on cervical lymphatic metastasis, which involves chin metastasis, bilateral cervical lymphatic metastasis and unilateral cervical lymphatic metastasis, etc. The symptoms caused by such metastasis usually include the following: 1.If the papillary thyroid cancer is a chin metastasis, such patients usually have symptoms such as neck swelling, hoarseness and toothache. 2.If the papillary thyroid cancer metastasis is a unilateral lymphatic metastasis, it usually compresses blood vessels and causes difficulty in blood supply. If the papillary thyroid cancer metastasis is bilateral cervical lymphatic metastasis, it will usually compress blood vessels and nerves bilaterally, which will cause difficulty in breathing, difficulty in swallowing, and insufficient blood supply to the brain. In conclusion, there are many symptoms of metastatic papillary thyroid cancer, and timely treatment should be made according to the symptoms.