If the weather suddenly turns cold or the temperature difference between day and night is large, it will lead to dyspnea, numbness of hands and feet, chills and lack of oxygen. Excuse me, what symptom is this ~ ~

Acute hypoxia can cause headache, emotional excitement, decreased or lost thinking ability, memory and judgment, and uncoordinated exercise. Severe hypoxia can cause morphological changes such as swelling, degeneration, necrosis and interstitial edema of brain tissue cells, which is related to interstitial edema caused by hypoxia and acidosis. These injuries usually occur within a few minutes of hypoxia. And irreversible. Cerebral vasodilation, brain cell and interstitial edema can cause increased intracranial pressure, which can cause headache, vomiting, irritability, convulsion, coma and even death. Chronic hypoxia is prone to fatigue, lethargy, inattention and other symptoms.

The mechanism of coma and death caused by severe hypoxia is that the membrane potential of nerve cells decreases and the synthesis of neurotransmitters decreases; The energy metabolism of brain cells is impaired, ATP is reduced and cell membrane permeability is increased; Acidosis, intracellular free Ca2+ increase, lysosomal enzyme release and cell edema lead to central nervous system dysfunction.

Don't wear tights if you feel lack of oxygen or your heart is uncomfortable! ! ! It's a little tight Can't wear it! ! ! Be sure to wear loose clothes! ! ! Do you know that too tight clothes will affect heart and lung function? Take more deep breaths, exercise and eat more fruits, such as apples. Don't hunch over, hunching over will also affect cardiopulmonary function! ! !