Lung calcification point means that in the lung imaging examination such as X-ray or chest CT examination, found in the lungs of high density shadow, then most of the considerations are obsolete lesions, may be caused by the following aspects: First, common is the lung inflammation after treatment, inflammation subsides as well as the mechanization of the leftover, then do not need to take anti-inflammatory drugs, regular review can be. Second, there may be previous tuberculosis or infected with tuberculosis bacillus, after treatment or self-immunity to heal themselves, similar to the scar tissue left behind. Third, pulmonary calcified spots caused by pulmonary malformation tumor. All of the above are benign lesions, which usually do not cause symptoms, and only require regular review of chest X-rays or CT.