Low globulin on retest after papillary thyroid cancer is normal, if thyroglobulin index is elevated, it often suggests the possibility of recurrence of thyroid cancer. Thyroglobulin is mainly produced by the thyroid gland. Patients with papillary thyroid cancer need to undergo thyroidectomy, which requires the removal of a large amount of thyroid tissue, and the remaining thyroid tissue is very small, and the amount of thyroglobulin produced will be reduced, so you can judge whether the surgery is successful or not, and the recurrence of the disease after the surgery by observing the change of the thyroglobulin level. After the surgery, we should pay attention to calcium supplement, pay attention to check the blood calcium; usually, we should pay attention to the diet is light and regular, eat more fresh fruits and vegetables, especially green vegetables and fruits, eat more high protein, high vitamin food, balanced nutrition, avoid spicy and stimulating food, avoid too sweet and too salty, and maintain a good mentality and living habits. If you have any symptoms of physical discomfort, you should go to the hospital in time and consult your physician for guidance.