When interstitial pneumonitis is caused by a targeted drug, the first step is to stop taking the targeted drug and then take medication according to the severity of the disease. After stopping the targeted drug, interstitial pneumonia should be treated symptomatically. Some reducing drugs can be used, which can be antioxidant, such as the use of acetylcysteine effervescent tablets, which have a certain effect on interstitial pneumonia. It can also be treated with some glucocorticoid drugs, such as dexamethasone, which can inhibit or delay the extent of interstitial lung lesions. Some severe patients can also be combined with anti-pulmonary fibrosis drugs, such as pirfenidone and nidaneb. Patients with interstitial pneumonitis should live a regular life and follow the doctor’s instructions for medication; live away from allergens, such as birds, contaminated humidifiers, and damp and moldy items. Maintain rest and a positive and optimistic state of mind, and eat a balanced diet. Pay attention to the prevention of infection, when interstitial pneumonia, must promptly go to the regular hospital, under the guidance of the physician to take medication treatment, do not blindly self medication.