When the aircraft descends, headaches occur mainly due to the change in air pressure. When the airplane is descending, the air pressure is rising, and the blood vessels in the head have to adapt to the change in air pressure to contract, and when the pressure in the contracted blood vessels rises, the headache will occur. It is recommended that patients drink more warm water before the plane descends to reduce the degree of vasoconstriction in the head and avoid the occurrence of headache symptoms as much as possible. Some patients are very sensitive to the air pressure and may have severe headache and unbearable headache, so the patient should be observed for abnormal blood pressure.