A small fibrous focus in the upper lobe of the left lung is a small lesion in the upper lobe of the left lung that is left behind by self-repair through fibrous connective tissue proliferation after infection or injury.
A few fibrous foci in the upper lobe of the left lung are usually old foci, left after self-repair through fibrous connective tissue proliferation due to lung infection or injury. Usually, they are left behind after the healing of pneumonia, tuberculosis and other diseases. The fibrosis is small in scope and usually has no uncomfortable symptoms, so it does not need special treatment and can be followed up and observed on a regular basis.
If the fibrous foci in the upper lobe of the left lung affects the lung function, and there are symptoms such as lack of oxygen and dyspnea, it is recommended to go to the hospital in time for early and regular treatment.