Every time the weather changes, such as typhoon and rain, both of them feel headache. What's going on?

Oxygen partial pressure is the closest relationship between air pressure and human body. If the air pressure is reduced, the partial pressure of oxygen will also be reduced, which will make people feel hypoxia, thus expanding the cerebral vessels, increasing the cerebral blood volume, and causing brain edema, causing headaches, dizziness, rapid breathing and heartbeat, loss of appetite, nausea and other symptoms. It will make normal people feel uncomfortable, the patient's condition will get worse, and the serious patient will easily die. It is found that the lowest monthly pressure is related to the peak of population death. When the air pressure is low and the air pressure changes greatly, the mortality rate of the elderly will increase by more than 80%. Studies abroad have pointed out that schizophrenia is positively correlated with the change of air pressure. Changes in air pressure have different effects on blood pressure. The arterial wall of hypertensive patients is already under strong pressure in the body. In low-pressure weather, they will try to eliminate the external pressure brought by low pressure. Blood pressure will rise. Patients with low blood pressure will continue to decline in low-pressure weather, which will make people feel uncomfortable. Hypotension is very dangerous to cardiovascular and cerebrovascular patients, cranial nerves and mental patients, and the elderly and infirm. These people may have sudden hemiplegia due to cerebral thrombosis or cerebral hemorrhage, and in severe cases, they may have cardiac insufficiency, myocardial infarction, diabetic coma and even suicide. Foreign studies have found that low blood pressure can also cause heart disease and lead to a series of wrong behaviors. People become easily excited or listless, which is completely different; Sometimes my eyes will swell, my head will hurt, my skin will swell, my limbs will hurt, I will be sick, I will be upset, I can't stand a little noise, my movements will be uncoordinated, and traffic accidents will suddenly increase. Once the air pressure rises again, the above symptoms will slow down or disappear invisibly. When will this happen, usually before or after the typhoon comes, or the front system passes by. Simply put, it is the time of day when the weather turns from rainy to sunny or from sunny to sunny.