Most of the streaks in the lungs are old lesions, which are relatively not serious, but cannot be generalized, and very few of them are malignant, which need to be evaluated comprehensively with the clinical reality. The scarring of the lungs is usually caused by infection or trauma, such as pneumonia or tuberculosis, and the inflammatory cells have been replaced by scar tissue after necrosis, which is not necessary to deal with this kind of old lesion, or the wound heals and forms a scar after trauma, which is not necessary to deal with it. If the patient has cough, sputum, hemoptysis and other symptoms, there may be lung infection, need to actively anti-infective treatment, can be used such as cefuroxime, nenoxacin and other drugs. In addition, a few malignant lesions caused by lung streak shadow need early anti-tumor treatment. Lungs with small streaks of shadow need to actively seek medical treatment, improve the relevant examination, if necessary, actively cooperate with the treatment.