It is true that it is not recommended to fly immediately after wisdom tooth extraction. Generally speaking, this is mainly related to the pressure change and the risk of bleeding from the wisdom tooth extraction. When a person is flying, the pressure on the whole body including the mouth is different in the cabin and on the ground, and this change in pressure may cause blood clots in the extraction wound or the expansion of blood vessels in the extraction wound, and the risk of bleeding from the extraction wound may occur, especially in the airplane, where there are no better medical conditions. Therefore, it is recommended not to fly within three days after the extraction of teeth, especially after the wisdom tooth extraction.