It is more common that the incision is always a little red after thyroid surgery. One of the possibilities is that the wound is in the recovery period, the wound healing time is short, there will be a large number of new blood vessels in the middle of the incision, the blood vessels are reddish, which will show a little bit of redness of the wound, this situation is normal, pay attention to observation. Another possibility is that the wound is infected, due to untimely change of medication and other reasons for infection, it will be manifested as redness and swelling of the wound, and even there will be secretion, then you should actively improve the blood routine, secretion culture, etc., increase the frequency of changing the medication to keep the wound clean, and if necessary, to give taking amoxicillin, cephalexin and other antibiotics to fight infection treatment. The above situations need to consult a doctor in time to clarify the cause.