Calcified foci in the lower lobes of both lungs generally refer to some old fibrous foci that have been left behind by the patient who had suffered from the disease, improved after treatment, or self-absorbed, and have been calcified. Generally speaking, the foci are relatively stable and do not require special treatment and can be observed clinically. Of course, some patients may have symptoms such as cough and hemoptysis on the basis of the original lesion, which is secondary to the problem of bronchiectasis. In addition, some patients may have recurrence of the original disease, such as recurrence of tuberculosis, which needs to be followed up and observed, and if there are any of the above symptoms, it is necessary to go to the hospital in time to take chest radiographs or do chest CT, blood tests and other tests.