The formation of cavities in the lungs is not necessarily very serious, the specific circumstances should be based on the causative factors, the size of the cavity, etc., if the inflammatory diseases caused by the cavity is small without obvious discomfort is not serious, if the malignant diseases caused by obvious discomfort is a more serious situation. 1. Not serious: If the lung cavity is caused by inflammatory diseases, such as tuberculosis, fungal infection, lung abscess, etc., there will only be coughing, chest tightness and other minor symptoms, usually after standardized treatment, it will be gradually restored to alleviate the problem, so it does not belong to a serious disease, and it will not affect the patient’s life after cure. 2. Serious: if the lung cavity is caused by cancer, it belongs to serious situation, and cancerous cavity is common in patients with squamous lung cancer. Patients may have symptoms such as cough, hemoptysis, etc. Some patients may also have fever due to cavity infection. This condition will affect the life span of patients, especially in advanced lung cancer, so it needs to be treated actively at an early stage. It is suggested that patients with cavities in lungs should seek medical treatment in time to avoid delaying the condition and causing serious consequences.