Haze is a general term for fog and haze, and a direct description of air pollution. In clear weather, as the temperature of the earth’s surface rises, it lifts some inhalables to a higher space away from the earth’s surface, and in hazy days, the earth’s surface does not get sunlight, the humidity in the air increases significantly, and there are a large number of inhalables in the air near the earth’s surface, and these inhalables are not where some of the These inhalable substances are not only toxic and harmful to human body, but also harmful microorganisms that can cause diseases. The effects on the human body are probably as follows: 1. Due to the presence of a large number of toxic and harmful respirable substances in the air on the earth’s surface during haze, they act directly on the mucous membrane of the respiratory tract and easily induce respiratory diseases such as cough, asthma, tracheitis or bronchitis, and breathing difficulties. 2, haze because the earth’s surface does not get sunlight, many disease-causing microorganisms can survive, at the same time, in the humid environment allows a large number of disease-causing microorganisms to multiply rapidly, so that the incidence of infectious diseases increased significantly, especially the respiratory system is more vulnerable to the attack of disease-causing microorganisms. 3, very easy to induce cardiovascular and cerebrovascular hypoxic diseases, haze days due to low air pressure, in the case of the same oxygen concentration, the actual amount of oxygen inhaled by the body (partial pressure of oxygen) will be significantly less than in sunny weather, at the same time, due to increased humidity in the air, sucked into the lungs of fresh air from the outside, in the alveoli parts can not be fully diffused exchange, the actual absorption of oxygen by the body to reduce the amount of pressure in the above-mentioned dual factors Under the pressure of these two factors, the body is caused by hypoxia, therefore, on the basis of the original cardiovascular disease, so that the heart and brain, which is already on the edge of hypoxia, changes in the external environment is very likely to induce disease attacks. 4. Due to the lack of oxygen, the metabolism of the body will be directly affected, thus bringing adverse effects on various systems, such as the skin, kidney, liver, growth and development, etc. For the above-mentioned haze on the human body, it is recommended to take the following preventive measures 1, minimize outdoor activities, especially friends who like morning exercise, should try to avoid outdoor stay time, according to local conditions, it is recommended to change to indoor fitness exercise. 2.When you need to go out, you can wear a mask, this is especially important for the elderly, children and the frail. 3, usually have a history of cardiovascular disease, such as coronary heart disease, angina, hypertension, cerebral blood supply, headaches and dizziness, moderate to reduce the amount of activity, more rest, to reduce the body’s oxygen consumption to compensate for the lack of oxygen intake. 4, those who have conditions suggest moderate oxygen intake to prevent cardiovascular and cerebrovascular disease attacks, commonly used oxygen products are oxygen cylinders, oxygen bags, oxygen machines, those who are more serious or have a history of chronic hypoxic diseases, can also go to the hospital to receive intermittent hyperbaric oxygen therapy, the amount of oxygen inhaled is more than 10 times the amount of oxygen in the air, can be selected according to their own circumstances, the body oxygen content increases, but also conducive to the body’s toxic and harmful substances metabolism and decomposition. The oxygen machine with negative oxygen ion may be more suitable for home use, negative oxygen ion can effectively kill the air in the treatment of microorganisms, can play a role in refreshing and purifying the air, at the same time, negative oxygen ion can also adsorb inhalable air, so that we suck to a more pure air. The choice of oxygen intake, except for individual respiratory diseases, with higher concentration and larger flow is more conducive to health, take hyperbaric oxygen as an example, a preventive treatment, similar to a human bath, a thorough “lung wash”, the deep lungs of the dirty gas completely out of the body, but also thoroughly improve the body oxygen deficiency. The choice of oxygen inhalation time: At home, oxygen inhalation is preferable to “short time, multi-stimulation” oxygen inhalation, each inhalation time 15-30 minutes, master the principle of increasing the number of oxygen inhalation priority, especially before going to bed and after waking up in the morning should be moderate oxygen inhalation, more conducive to the prevention of cardiovascular and cerebrovascular disease attacks.