Calcifications of the lungs are scarring that forms after the inflammation of the lung parenchyma has healed, and because scarring has already formed and the lesion has stabilized, they usually do not require treatment. Lung calcifications are usually discovered during a normal physical examination and are caused by inflammation of the lungs, the most common cause being tuberculosis, which is when Mycobacterium tuberculosis infects the lungs. There is no need to be alarmed at the discovery of calcified foci; the air you breathe every day can contain Mycobacterium tuberculosis, and it is normal to be infected with it. As long as the immunity is normal and one’s body has a very strong resistance after being infected with Mycobacterium tuberculosis, it will not develop into tuberculosis. The metabolism of Mycobacterium tuberculosis in the lungs is low, its ability to reproduce is weakened, the lesion loses water and dries out, and calcification is formed when calcium carbonate and calcium phosphate attach, but the infected person will not have any symptoms. Only a small number of people infected with Mycobacterium tuberculosis develop tuberculosis because of low immunity and their own inability to fight off Mycobacterium tuberculosis. TB is also currently treatable, so even if TB is found, the prognosis for regular treatment is good. Generally speaking, calcified foci in the lungs are an indication of healing of the lesions, which only means that they were once infected and have no bad effects on the body, not to mention that they do not need to be treated.