Swelling above the wound after thyroid nodule surgery may be due to local edema, incision infection, postoperative bleeding and other reasons, which need to be analyzed specifically. 1. Local edema: surgical incision is a tissue damage to the skin, which may lead to an increase in local capillary permeability, causing swelling around the incision, in general, local edema at the wound, and there is no redness and heat. 2. Incision infection: Mostly due to the infection caused by improper care after surgery, there may be pus formation locally, and there is obvious redness, swelling and heat pain around the incision, at this time you need to actively deal with the infection. 3. Postoperative bleeding: improper ligation of blood vessels during surgery may cause postoperative bleeding, resulting in subcutaneous hematoma. If the bleeding is fast, it can cause short-term symptoms such as dyspnea, which requires urgent incision and treatment of hematoma. Symptoms of swelling above the wound after thyroid nodule surgery should be reflected to the appropriate doctor immediately and treated symptomatically under the doctor’s guidance.