Cavities shown on CT are most often seen in lung tissue, with cavities caused by inflammation, tuberculosis, and tumors being the most common. Cavitation caused by tuberculosis is very common in clinical practice and can be further defined by relevant tests, including Mycobacterium tuberculosis smear test and PPD test. Under the guidance of a doctor, the patient’s CT cavity and symptoms such as coughing, sputum and blood will be treated systematically. The rational use of antibiotics, such as rifampicin, pyrazinamide and streptomycin, which have been used for about a year, can bring the disease under control and reduce the patient’s symptoms. However, the formed cavity cannot be restored to normal, and the damaged lung tissue cannot be corrected, which can only make the condition better but cannot cure its cavity.