There is no such thing as acute bronchial asthmatitis, which is clinically called an acute attack of bronchial asthma. The condition refers to a sudden worsening of symptoms such as shortness of breath, dyspnea, chest tightness, or coughing, accompanied by a decrease in expiratory flow. It is often caused by exposure to irritants such as allergens or improper treatment. In asthmatics, the severity varies, and further exacerbations can occur within hours or days, or can be seriously life-threatening within minutes. The severity of an attack can be categorized as mild, moderate, severe, or critical. 1. Mild: shortness of breath when walking or walking up stairs, anxiety, rales on breathing, normal lung function and blood gas analysis results. 2. Moderate: shortness of breath with a little activity, speech is often interrupted. Sometimes anxiety, increased respiratory rate, may appear three concave signs, shortness of breath sound loud and diffuse, accelerated heart rate, pulse rate odd. 3. Severe:Shortness of breath at rest, sitting breathing, anxiety, irritability, profuse sweating, respiratory rate greater than 30 breaths per minute, accompanied by the triple concave sign, loud rales, heart rate greater than 120 beats per minute, odd pulse. 4. Critically ill patients: inability to speak, lethargy or blurred consciousness, weakened or even disappeared wheezing, slow or irregular pulse, severe hypoxemia and hypercapnia. Bronchial asthma patients, the appearance of the above symptoms, need to go to the hospital in a timely manner, under the guidance of the doctor for medication, and the development of individualized long-term treatment plan.