Thyroid surgery above the incision hardness is common in the following reasons: first, suture rejection, the incision after surgery generally need to use sutures for suturing, both non-absorbable and absorbable lines, when the body reacts to these sutures, it will lead to hardness above the incision, generally do not worry too much, if there is no obvious redness, swelling, pain or exudation, the lumps can be gradually softened, but if there is obvious pain or redness, you need to go to the hospital in time for treatment, if necessary, need to be cut open, the sutures removed, the lump can disappear. But if there is obvious pain or redness, you need to go to the hospital in time for treatment, and if necessary, you need to cut the incision and remove the sutures, so that the lumps can disappear. Second, the wound fluid accumulation, which is often caused by fat liquefaction or infection, need to go to the hospital to check the blood routine, ultrasound and so on for clarification, if necessary, need to be given to change the medicine or anti-inflammatory treatment. Third, scar formation caused by the prolongation of time lumps can subside, but if the lumps do not subside significantly, you can go to the regular medical aesthetic department for treatment.