Prevention is a very important part of the principles of asthma treatment and is mainly used in the remission phase with the aim of reducing airway inflammation. According to the guidelines for asthma control, asthma is classified into 4 classes: class I for intermittent attacks, class II for mild persistence, class III for moderate persistence, and class IV for moderate persistence. The protocol specifies that in terms of daily control medication, no medication is required for Grade 1 patients and the preferred medication for those with Grade 2 or higher is an inhaled glucocorticoid. Clearly for those who need treatment, glucocorticosteroid base is the first choice. However, the protocol talks about applying glucocorticoid doses while also mentioning other treatment options, including leukotriene receptor antagonists, theophylline extended-release tablets, sodium cromoglycate, and oral long-acting beta2 agonists, meaning that glucocorticoids are not the only option. Generally, for people with persistent asthma, doctors recommend inhaled glucocorticosteroids as the first choice to keep the disease under complete control and maintain it for a period of time, and then gradually reduce the dosage; for mild asthma patients who have a great fear of glucocorticosteroids or their family members, they can try other options and monitor the efficacy for timely adjustment.