Patients with interstitial pneumonia have ineffective or only theoretically effective nebulizer therapy because the main nebulizer used in patients with interstitial pneumonia is glucocorticoids. Interstitial pneumonia is a fibroplasia of the interstitial lung, to inhibit it there must be a relatively high concentration of glucocorticoids to be effective, and nebulized inhalation mainly acts on the airway mucosa and the smooth muscle of the airway, which can play an anti-inflammatory role, mainly for the treatment of chronic obstructive pulmonary and asthma, it is impossible to make the interstitial lung reach a fairly high therapeutic concentration through nebulization, so the treatment of interstitial lung disease with nebulized inhaled glucocorticoids ineffective.