Pleural calcified foci, as the name implies, are a type of lesion that appears after a pleuritis lesion, and are called pleural calcified foci. Pleural calcification foci occur when a patient is found to have a lesion that is not treated in a timely manner, resulting in a pleural calcification foci. Pleural calcification foci are caused by inflammation of the chest or pulmonary tuberculosis, so once a patient is found to have a chest disease or pulmonary disease, he or she must go to the hospital promptly for consultation and treatment, and have a CT scan done promptly to check whether the lung lesion occurs and to examine the cause so as to treat the disease. If the pleural calcification foci are found to be gradually increasing, it is important to follow up regularly at this time.