Headache after thyroid surgery may be caused by anesthesia reaction, influence of surgical position, mental factors and so on. 1. Anesthesia reaction: Since thyroid surgery needs to be operated under general anesthesia, anesthesia drugs may have certain effects on the blood circulatory system, which may lead to changes in blood pressure. When the anesthetic drugs are not fully metabolized, headache symptoms may occur. 2. Influence of surgical position: Due to the special location of the thyroid gland, it is often necessary to tilt the head back during surgery, thus fully exposing the neck. The duration of the surgery is usually 2 to 3 hours, which will cause some pulling on the local muscles and nerves, thus causing headache. 3. Mental factors: Since patients tend to be mentally nervous before surgery, not recovering well after surgery may lead to headache symptoms. After thyroid surgery, you must pay attention to rest and adjust your lifestyle. If the headache symptoms continue to be unrelieved, you need to inform your doctor in time and let him or her handle it.