Whether small flaky shadow in lung is serious or not needs to be judged after combining clinical symptoms and relevant auxiliary examinations to clarify the cause of the disease. If it is due to early lung cancer that small flaky ground-glass shadow is formed, attention must be paid to it, and it is better to undergo surgery as soon as possible to remove the lesion after early detection of lung cancer. If the small patchy ground-glass shadow is caused by pulmonary tuberculosis with symptoms of tuberculosis toxicity, such as low fever in the afternoon, night sweating (abnormal sweating after going to sleep, and sweating stops after waking up), fatigue, etc., it is necessary to follow the doctor’s instruction to carry out regular anti-tuberculosis treatment, such as isoniazid, rifampicin, ethambutol, pyrazinamide and streptomycin, etc., so as not to cause recurrent tuberculosis infections. If the small flaky shadow is caused by lung infectious disease, it is usually accompanied by cough, fever, sputum and other clinical manifestations, and laboratory tests can also find inflammation-related indexes, such as C-reactive protein, leukocytes and other abnormally elevated, and it is necessary to pass the active anti-infective treatment as well as the symptomatic treatment before the lung inflammation can be cured, and the small flaky shadow in the imaging will disappear accordingly.