Asthma nebulizer do a few days depends on the asthma disease stage, if it is an acute exacerbation, should be nebulized for 5~7 days; if it is a chronic remission generally do not need to be nebulized. 1. Acute exacerbation: nebulization is given immediately, available drugs include β2 agonists such as salbutamol, terbutaline, etc., usually 5~7 days, combined with glucocorticosteroids and bronchodilators such as inhalation budesonide formoterol, etc., and if the patient is in a critical condition, it is recommended to combine with intravenous glucocorticosteroids such as metiprednisolone. 2. Chronic remission: As the patient’s condition is stable, inhalation and oral symptomatic drugs such as budesonide formoterol for inhalation and montelukast for oral administration are sufficient, and nebulization is not needed. It is necessary to avoid contact with allergens, prevent infections, and adjust the regimen with regular lung function tests and specialty follow-up. If asthma is not relieved, or accompanied by other symptoms, it is necessary to go to the hospital in time, to identify the cause of asthma, and then give targeted treatment.