This is actually due to the normal postoperative edema reaction of the incision. Because the skin flaps above and below the incision are widely separated during thyroid nodule surgery, this can easily cause edema of the tissues surrounding the incision. Especially in middle-aged and older women, the incision is easily edematous because the skin is loose and there is more fatty tissue. Patients should not be alarmed by this situation, as the edema will gradually return to a flat incision within 2 months after surgery as the edema is absorbed. The incision of thyroid surgery is generally as thin as a line within one month, then it will gradually thicken in the first month after surgery, and it will have a protrusion in the third month after surgery, reaching a peak in the sixth month after surgery, and then the incision will gradually flatten out and become lighter in color, and by one year after surgery, most of the incisions will become lighter and less obvious. The healing of thyroid surgery incisions is related to the good or bad alignment of the incision sutures and the individual’s physical condition, and is not related to the placement of drains.