Acute bronchial asthma, also known as an acute attack of bronchial asthma, patients usually have symptoms such as wheezing, shortness of breath, coughing, chest tightness, etc. In severe cases, respiratory failure can occur with altered consciousness. 1. Wheezing: Patients with acute bronchial asthma attacks are characterized by a decrease in expiratory flow and may experience short-term wheezing. 2. shortness of breath: patients in acute bronchial asthma attack due to bronchial mucosal irritation, resulting in airway hyperresponsiveness occurs, there will be symptoms of shortness of breath. 3. Cough: patients in acute bronchial asthma attack due to bronchial mucosal sensitivity and trigger cough, but also the symptoms of persistent cough. 4. Chest tightness: in acute bronchial asthma attack, the bronchial tubes are in persistent spasm, the body tissue oxygen supply is insufficient, myocardial persistent ischemia and hypoxia will lead to chest tightness. When the patient has the above symptoms, need to go to the hospital in time, under the guidance of the doctor, according to the actual situation of standardized treatment, so as not to delay the condition.