A few fibrous foci in the lower lobe of the left lung can be treated with observation and anti-infective treatment. If the patient has fibrous foci in the lobe of the lung, which is not accompanied by clinical symptoms, observation and treatment can be carried out, and if there are obvious clinical symptoms, anti-infective treatment is needed. Lung lobe fibrotic foci are patients who have been infected with lung infections leading to lung imaging changes, if the patient does not have obvious clinical symptoms, such as the patient does not have coughing, coughing up sputum, fever and blood in the sputum, observation treatment can be carried out, and regular review of the chest CT can be. Pulmonary fibrotic foci, if accompanied by cough, sputum, fever and other manifestations, need to carry out anti-infection, can choose cephalosporins, penicillins for anti-infection treatment, after active treatment, the patient’s condition improved. Patients usually have discomfort, timely to the hospital, do not be careless, so as not to delay treatment.