Chest X-ray or chest CT examination found increased texture of both lungs, mostly due to the following reasons: 1, long-term smokers can appear increased texture of both lungs, but also accompanied by cough, cough and other symptoms; 2, chronic bronchitis, chronic bronchitis patients with long-term repeated cough, cough, can cause increased texture of both lungs; 3, cardiac insufficiency caused by pulmonary stasis, can also appear increased texture of both lungs, often It is often seen in patients with cardiovascular disease, and requires treatment for the heart before the condition will improve. If the patient does not have obvious symptoms, but only the chest X-ray or CT found that the texture of both lungs increased, can be dynamic observation.