Pneumonia may be caused by irregular treatment, improper daily care and low immunity. 1. Unstandardized treatment: Pneumonia patients need to be treated with medication strictly under the guidance of the doctor in sufficient quantity and duration, if the patients are not standardized in treatment, stopping the medication without authorization or changing the dosage of the medication, etc., the condition may be prolonged and not be cured. 2. Inadequate daily care: because smoking, sputum expectoration and other factors can also induce or aggravate pneumonia, so patients usually need to develop good habits, quit smoking in a timely manner, take more rest, to avoid excessive exertion, bedridden patients should strengthen bedside care, turning and patting the back. 3. Low immunity: If the patient has diabetes, blood diseases and other basic diseases, and not actively treat the case, resulting in low immunity, the condition may also be delayed. It is recommended that patients with pneumonia old bad, timely find out the reasons, combined with their own situation targeted standardized treatment.