Asthma in infants can be caused by a variety of factors, including viral or bacterial infections, and allergies. If allergies are considered to be the cause of asthma, allergens should be sought out to avoid re-exposure to or ingestion of allergens so that asthma does not recur. If the asthma is caused by a viral or bacterial infection that causes respiratory tract lesions, antiviral treatment should be given to the virus, and nebulizer treatment with interferon can be used. If it is a bacterial infection, it can be treated with cephalosporins or penicillins, such as cefaclor and amoxicillin. Whether the asthma is caused by viral or bacterial infections or allergies, symptomatic treatment is important and infants can be given asthma calming medications. In addition, nebulization can also be performed to calm asthma, such as choosing budesonide nebulizer solution plus salbutamol nebulizer solution, together with good results of nebulization treatment.