Bronchial asthma is characterized by recurrent episodes of coughing, wheezing, chest tightness and breath-holding, so it is easy to relapse. However, in clinical treatment, as long as the regular treatment plan is followed for long-term control, it is generally not easy to relapse. There are so many reasons for recurrence: 1. cold is a cause of recurrence, people with poor resistance, especially children, should pay attention to strengthen care to reduce this factor; 2. allergens: many asthma patients are caused by allergens, need to check allergies first, the living environment should pay attention to allergen factors, reduce the concentration of mites at home, pollen season, pay attention to wear masks outside, less open windows, less walking to the mountains, the mountains have a higher concentration of pollen The concentration of pollen is higher in the mountains. First determine the allergens, purposeful, targeted to avoid, so as to minimize the recurrence of asthma; 3, standardized medication can reduce recurrent asthma attacks, if the asthma control is quite good, cold or encounter some allergen stimulation, will not cause an acute attack of asthma, will not cause asthma aggravation, and can live as normal people.