Small lung blisters are usually not serious. The severity of pulmonary blisters depends on the size of the blisters, the presence or absence of complications, and the underlying state of the patient. A pulmonary blister is a fusion of the alveoli, the smallest structural unit of the lung, where two or more alveolar walls fuse to form a pulmonary blister. Smaller, solitary pulmonary herpes may be asymptomatic and may be discovered incidentally by physical examination, and may not be treated with special treatment. If they are secondary to underlying lung diseases, such as chronic obstructive pulmonary disease (COPD), it is important to actively treat the primary disease to avoid disease progression. Although pulmonary herpes is an irreversible lung lesion, small pulmonary herpes are usually asymptomatic and do not cause complications, which do not affect the patient’s quality of life, so they are not serious. In life, pay attention to rest, quit smoking and drinking, avoid staying up all night, holding breath, coughing, lifting heavy objects with force and catching a cold, etc., to avoid rupture of pulmonary herpes. It is recommended that patients with pulmonary herpes should consult a doctor in time and listen to his professional advice.