Fibrous streaks are usually seen in the lungs during an examination, but not too often in normal people. Fibrous streaks in the lungs are usually due to pneumonia or tuberculosis after or after no treatment, the lesion is not completely absorbed by the scar left; may also be due to long-term smoking, exposure to dust and smoke and other harmful gases, most of them are benign lesions, representing the disease is in the healing stage; some patients may be due to lung tumor occupancy, which needs to be confirmed by intensive CT or pathology examination. When fibrous streaks are detected in the lungs and there are no uncomfortable symptoms, no special treatment is needed and regular review is sufficient; if accompanied by chest pain, dyspnea, coughing and other symptoms, further relevant examinations should be completed to clarify the cause of the disease, and actively treat the cause of the disease. Usually should quit smoking and alcohol, avoid contact with dust, smoke and other harmful gases.