The drain tube is usually removed about 2~4 days after thyroid surgery, but it can’t be generalized, and it also needs to be decided according to the amount of fluid in the drain tube and the size of the surgical wound. 1. The amount of fluid in the drain tube: if the drain tube has more drainage fluid after surgery, in this case, it is necessary to prolong the time of placing the drain tube appropriately. If the drain tube is removed too early, it will cause the fluid in the wound to be unable to be drained smoothly, which will lead to the wound infection, and if the drainage fluid in the drain tube is less, the drain tube can be removed after 48 hours or so. 2. Surgical wound size: if the patient belongs to benign lesions, there is no need to carry out lymph node dissection in the process of surgery, the surgical wound will be relatively small, and the drain will be removed in three days or so; if the patient belongs to malignant tumors, there is a need to carry out lymph node dissection in the process of surgery, and it will take about four days to remove the drain. If the indications for removing the drains are met, the drains can be removed in time under the guidance of the doctor, which will enable the wound to heal early.