Asthma may be relieved for a few minutes or 1~2 hours or 1 day after the medication is administered, and recurrent or severe attacks may take about 10~20 days to be well relieved and under control. Asthma patients who are exposed to allergens, sudden attacks of wheezing, dyspnea symptoms, timely application of albuterol aerosol or budesonide and other medications as prescribed by the doctor, some patients may be able to relieve in about 3 to 5 minutes. In patients with more severe asthma, the symptoms of breathlessness and dyspnea can usually be reduced soon after timely application of medication, but it usually takes about 1~2 hours or 1 day for the symptoms to be significantly relieved or disappear. Patients with repeated exposure to allergens or particularly severe asthma may also experience longer periods of time. The application of medication is beneficial in controlling the frequency of attacks and reducing clinical symptoms. With proper treatment, the patient’s symptoms are well controlled, and it usually takes about 10 to 20 days for the attack to cease. It should be noted that asthma wheezing, dyspnea and other symptoms can be relieved by short-term use of medication, but the remission period of asthma requires regular treatment for six months to a year, and patients with uncontrolled symptoms can gradually achieve full control during the treatment period. Asthma is a particularly high chance of recurrence and more serious diseases, if recurrent attacks, you should consult a doctor in a timely manner, under the guidance of the application of medication and reasonable treatment, usually to avoid triggering factors.