What are the causes of increased lung markings?

There are many reasons for the increase of lung markings, which can be pathological, physiological, or due to the increase of lung markings caused by film technology. To sum up, there are the following conditions: 1. Bronchial lung markings increase, manifested as uneven thickness of lung markings, often mixed with some deformed textures; Small cellular inflammation is normally seen in chronic bronchitis, bronchiectasis, etc.; 2. Increased vascular lung markings, normally manifested as thick lung markings, from hilum to lung, maintaining the characteristics of vascular routing, often accompanied by symptoms of enlarged heart, mainly seen in rheumatic heart disease, congenital heart disease, etc.;3. Increased lymphatic lung markings, fine reticular lung markings in both lungs, mostly seen in cancerous lymphangitis; 4, smoking lung markings increased, as the name suggests, seen in the performance of normal smoking patients lung markings, performance for both lung markings increased, but normal, mainly due to long-term smoking;5, physiological lung markings increased, mainly seen in the elderly or obese people, the elderly lung interstitium is relatively rich, so it can show the increase of lung markings, and obese people due to subcutaneous fat increased, X-ray absorption increased during the film, resulting in increased lung markings. The above five phenomena include pathological, physiological and technical changes. Therefore, if there is an increase in lung markings reported on chest radiographs, it should be analyzed and treated according to different situations.