Recurrent asthma attacks are common, and their attacks usually have the following causes: 1. acute infections caused by viral infections, bacterial infections, and atypical pathogens such as mycoplasma and chlamydia, leading to acute exacerbation of asthma; 2. encountering allergens, such as inhaled paints and fumes, eating allergic foods such as peanuts and milk, and also possibly because of encountering cold air, chemicals, chemical gases or chemical substances appear to be allergenic, leading to acute exacerbation of asthma; 3, mental factors such as psychological tension and emotional excitement may lead to acute asthma attacks; 4, strenuous exercise is not suitable for asthma patients, and some patients have asthma induced by strenuous exercise such as long and short runs. Repeated asthma exacerbations can cause increased airway inflammation and thickening of the airway mucosa, resulting in increased asthma symptoms, manifested as frequent coughing, increased sputum and wheezing. Such patients, especially those with severe exacerbations, must always have emergency medication around them, so that once they encounter allergic factors or unpredictable factors, the use of emergency medication during an acute attack can provide temporary relief and buy time to go to the hospital for treatment, and a severe asthma attack can be life-threatening.