Bronchial asthma is a common respiratory disease, and an acute attack without timely and proper treatment can cause great suffering and even threaten the life of the patient. Therefore, it is necessary for asthma patients and their relatives and friends to acquire some knowledge about the rescue and treatment of acute asthma attacks. Asthma patients, no matter how well their condition is controlled, should carry emergency drugs with them. A short-acting inhaled β2 agonist that works within minutes of inhalation is as important to asthma as nitroglycerin is to coronary artery disease, and can be life-saving at critical times. Patients should be skilled in its use (inhalation method) and change it regularly to prevent failure. However, this drug should only be used as an emergency medicine for acute asthma attacks, and should not be used regularly for a long time, because long-term regular use will lead to “drug resistance” in the respiratory tract, which will not play its proper role when it is really needed. Asthma attacks are usually urgent, and there are many triggers before the attack, such as inhalation of certain allergens or irritating gases, or even after a common cold, itching of the nose and eyelids, tearing, frequent sneezing, runny nose, dry cough, followed by chest tightness, breath-holding, or even a sense of suffocation, and labored exhalation, forcing the patient to sit and rest, with a “whistling sound” in the airway. whistling sound” in the airway. Asthma attacks have a certain seasonal and temporal pattern, such as good in summer and autumn, easy to attack or aggravate at night or early morning. First of all, the patient should remain seated, unbutton the clothes, keep the surrounding environment well ventilated as much as possible, start oxygen inhalation if possible, and repeat inhalation of short-acting β2 agonist, 2~4 sprays every 20 min in the first hour. Subsequently, depending on the response to treatment, the inhalation rate is adjusted to 2-4 sprays every 3-4 hours. If the patient has severe symptoms and is unable to inhale an adequate dose of medication, some devices such as storage canisters can be used to assist. Most patients with mild attacks can be relieved after such simple treatment. For patients with moderate to severe attacks whose symptoms are still not relieved, they should enter a hospital for regular treatment as soon as possible. As a chronic respiratory allergic disease that cannot be cured, asthma requires long-term standardized treatment therapy, i.e. long-term inhaled glucocorticoids + long-acting β2 agonists. Only in this way can complete control of the disease be achieved, i.e. maintaining the same quality of life as that of a healthy person, essentially symptom-free and without acute attacks.