Lung wash can not wash off the smoke tar, the smoke tar in the lungs is mainly due to the patient’s daily smoking too much, which contains coal tar, nicotine and other harmful substances, in addition to causing smoke tar in the lungs, the particulate matter therein also has the possibility of carcinogenicity, should try to avoid smoking. Lung washing is mainly through respiratory endoscopy, the bronchoscope is placed in the area to be cleaned, through the injection of saline for rinsing. Lung washing is usually an option for diseases such as pneumoconiosis and alveolar proteinosis, but it cannot clean out the smoke tar. If you want to remove smoke tar from the lungs, you should first quit smoking as soon as possible to avoid smoke tar from entering the human body, and the smoke tar that already exists in the body may gradually disappear with the metabolism of the body.