1. After postoperative retained drainage tube thyroid surgery, the patient will have a drainage tube in the neck with the purpose of draining out the accumulated blood and exudate in the surgical wound. The drainage tube is a closed device underneath. Compared to open wound drainage (putting gauze strips etc. in the wound), closed drainage can ensure the cleanliness of the wound, and the drainage tube is retained for a longer period of time after surgery than open wound drainage, which can ensure adequate drainage of blood and exudate in the wound and reduce the incidence of postoperative infection. To prevent the drainage tube from dislodging, it is fixed with sutures to the skin during surgery and the stitches are removed when the drainage tube is removed. During hospitalization, the color, nature and amount of drainage fluid are regularly monitored by the medical staff. Initially after surgery, the drainage fluid is dark in color and light blood (the color of drainage is light red), which is normal and patients should not worry about it. The color of the drainage fluid will become lighter as time increases. The drainage will remain for 1 to 2 days after the procedure, and may remain for 3 to 4 days or longer in patients with more drainage fluid. After the drainage tube is removed without other complications, the patient can be discharged home. Beijing Friendship Hospital General Surgery Department Zhao Ning 2, regular review is indispensable for benign disease surgery will retain part of the normal gland, the residual gland can also occur any disease, so annual or every two years review thyroid ultrasound, you can monitor whether the nodule recurrence; long-term no change, you can extend the review interval or their own observation can be. After malignant tumor surgery, for the first two years, patients should review the ultrasound every six months; after two years, they should review the ultrasound once a year, and if they appear uncomfortable, they should seek medical attention at any time. In addition to review ultrasound, patients should also review thyroid function regularly. Patients who have been taking levothyroxine for a long time will have their thyroid function checked at least two to three times a year after surgery. The doctor adjusts the medication according to the patient’s thyroid function. For the first three months after surgery, the patient’s thyroid function is checked every month and the medication dose is adjusted, after which the patient’s medication dose remains the same. However, as the patient’s weight changes and the seasons change, the dose of thyroxine required by the body will change and the dose of medication will increase or decrease accordingly. 3. levothyroxine, how should I take the medication? Levothyroxine should be taken every morning on an empty stomach because the absorption rate of the drug is highest when taken on an empty stomach. If patients forget to take the medication on the same day, they need to make up the double dose on the next day. Patients with thyroid cancer need to take levothyroxine at a higher dose than the regular dose, so there will be two side effects: on the one hand, cardiovascular effects, patients may experience sinus tachycardia after taking the drug, and long-term sinus tachycardia will cause cardiac hypertrophy, which is poorly tolerated by older patients, but will not be affected by young people as they have a strong tolerance. On the other hand is osteoporosis, especially in postmenopausal women, for this part of the patients should be long-term supplementation of calcium tablets.