Enlargement of the right lung hilar may be caused by inflammation, tumor and vascular disease. 1. Inflammation: In case of bronchitis, it may cause right hilar enlargement, mainly due to bacterial, viral and other reasons to stimulate the lung tissues, coughing, fever and other symptoms, oral amoxicillin, acyclovir and other anti-inflammatory, anti-viral treatment. 2. Tumor: As tumor may cause lung tissue to become enlarged and block the airways, so the symptom of enlarged hilar may occur, which can be treated with surgical resection. 3. Vascular disease: When the patient is suffering from atrial septal defect, it may lead to pulmonary hypertension, which can be treated with interventional surgery. The right pulmonary hilar enlargement is recommended to consult a doctor in time, after clarifying the cause of the symptomatic treatment, in the daily life should follow the doctor’s prescription medication, prohibit smoking, prohibit alcohol, and when there is an abnormal situation, consult a doctor in time.