Fibrous lung lesions usually do not go away on their own. Fibrous lung foci are fibrous tissue lesions left behind after a lung infection has healed, most commonly after recovery from lung inflammation and tuberculosis. When the lungs recover from inflammation and tuberculosis, fibrous lung foci, which resemble a type of fibrous tissue deposition, can occur because some of the inflammation is not completely absorbed. In fact, pulmonary fibrous foci are not invasive, similar to the formation of scars after skin injury, and are a product of the body’s self-repair, and usually do not fade on their own. In lung CT examinations, it can be found that many people have fibrous lung lesions that persist for a long time and do not have a significant impact on their lives. Usually the fibrotic lung foci are small and do not require special treatment. However, if the lung fibrosis is found to be expanding and affecting lung function, prompt treatment is needed.