The causes of asthma are complex simple comb: 1, asthma elders, then the risk of asthma in later generations is high. 2, premature babies, the incidence of asthma increased. 3, childhood asthma is more common in boys. 4, Asthma is more common in women after puberty. 5, obesity increases the risk of asthma. 6, frequent contact with pollen, dust mites and other easy to get asthma. 7, colds will induce asthma in children. 8, feeding, chemical, pharmaceutical, printing and dyeing industries will induce asthma. 9, indoor humidity is too high (such as a long time on the humidifier) induced asthma. 10, perfume and second-hand smoke can cause asthma. Studies have shown that the number of hospitalizations due to acute asthma attacks accounted for 2.95% of the total number of hospitalizations in the Whistleblower Unit during the same period. The top 6 attack triggers were acute upper respiratory tract infections (42.3%), weather changes (22.8%), noxious gases (4.3%), allergenic stimuli (3.5%), strenuous exercise (1.8%) and air pollution (1.5%). Asthma cannot be cured, but asthma can be managed Symptoms: 1. No daytime symptoms, meaning you have no symptoms during the day. 2. No symptoms at night either, you don’t suffer from sleep disruption at night and you don’t wake up suffocating. 3, daily activities are not restricted, that is, you can go out, can participate in outdoor activities, can travel, can travel long distances, and even our well-controlled asthma patients can climb thousands of meters above sea level on the mountains, can go to Lhasa travel and so on. 4, do not need to take asthma-relieving drugs, only the usual maintenance drugs. 5, normal lung function. 6, no acute attacks.