Precautions against recurrence and metastasis of micropapillary thyroid cancer include dietary as well as therapeutic suggestions. 1. Dietary advice: if micropapillary thyroid cancer is less than 1cm, it can basically have a normal diet and generally does not need to strictly control iodine intake; if it is larger than 1cm, it needs to control iodine intake and avoid large amount of seafood intake, which can effectively prevent recurrence and metastasis of the tumor. 2. Treatment suggestion: Iodine 131 treatment is routinely needed after surgery for micropapillary thyroid cancer to try to remove the residual tumor cells and reduce the recurrence rate. In addition, postoperative oral thyroxine and endocrine therapy are usually needed after surgery, and thyrotropin should be maintained at 0.5~2μIU/ml for patients with micropapillary thyroid cancer under 1cm, and 0.1~0.5μIU/ml for those above 1cm, and thyroid function and B ultrasound should be rechecked regularly. If you have micropapillary thyroid cancer, you should pay attention to regular review.