Pulmonary obstruction is not a single disease, but may be more severe due to obstructive foci in the blood vessels or bronchial tubes of the lungs caused primarily by a variety of pathogenic factors. Some pulmonary obstruction is caused by pulmonary embolism, which occurs when an embolus becomes dislodged and blocks a pulmonary artery, causing a pulmonary embolism that results in a localized obstructive lesion in the lung tissue. This condition can have a serious impact on pulmonary ventilation and air exchange, resulting in an aggravation of the condition. Due to pulmonary obstruction caused by pulmonary embolism, complications such as chronic pulmonary heart disease and myocardial infarction may also occur, which may be hazardous to health and even life-threatening. In addition, lung obstruction in some people may be due to malignant tumor diseases such as lung cancer, which is a more serious condition.