Prolonged drainage time for thyroidectomy may be due to prolonged extubation time due to excessive drainage fluid. After thyroidectomy, due to the large trauma, there will be blood seepage or exudate, and it is usually necessary to place a drain so that the exudate can be drained to avoid subcutaneous fluid accumulation, and also to better observe the condition of the wound. Early drains after thyroidectomy contain a large amount of drainage fluid. It usually takes about two days to remove the catheter. If there is a large amount of drainage fluid, you can appropriately prolong the extraction time, and remove the catheter when there is not much drainage fluid, so as to avoid localized accumulation of blood and compression, which will cause respiratory difficulties, or even asphyxia, which can be life-threatening. Thyroidectomy drainage time is too long can consult the doctor to understand the specific situation, need to be under the guidance of the doctor to carry out a reasonable diet, try not to swallow, so as not to cause sore throat.