Pulmonary cavitation is mostly seen in the following conditions: 1, tuberculosis, patients with tuberculosis can develop cavitation, but also cough, afternoon low fever, night sweats, and even hemoptysis; 2, pulmonary fungal disease can also develop pulmonary cavitation, and patients often have a combination of chills, fever, poor spirits, and even hemoptysis; 3, lung tumors, patients with lung tumors can develop cavitation changes, often combined with blood in the sputum, chest pain, weight loss, mental atrophy and other symptoms. In conclusion, cavitation of the lung can be caused by many kinds of diseases, and further chest CT, bronchoscopy and other laboratory tests are needed to confirm the diagnosis.