What does it mean to have slightly increased markings on both lungs?

A slight increase in lung markings normally refers to an increase in bronchial vascular bundles. For this phenomenon, it may be a disease state, such as acute bronchitis, chronic cardiac insufficiency and other related diseases. However, it is also necessary to note that healthy people sometimes take chest radiographs, and may also report a slight increase in lung markings. If there are no clinical symptoms and no other related diseases, chest CT can be considered for further investigation in this case. Under normal circumstances, chest CT will be normal. The above health science knowledge is for reference only. The specific situation needs to be checked in a regular hospital and judged by a professional doctor.