Left upper lung calcification foci whether need treatment, mainly depends on the cause and the accompanying conditions, in the clinical appearance of the left upper lung calcification foci, more commonly caused by inflammatory reaction, such as Mycobacterium tuberculosis infection caused by the left upper lung calcification foci, if the patient appeared to have a persistent low-grade fever, and there is coughing, coughing up sputum, hemoptysis, indicating that it is the inflammatory phase, must be combined with standardized use of anti-tuberculosis drugs to carry out The treatment must be combined with standardized anti-tuberculosis drugs to achieve cure. If there is no clinical symptom to check the CT of both lungs, there is no change in regular dynamic observation, and the sputum test is negative, it means that it is completely cured, this is the calcified foci left in the left upper lung after the Mycobacterium tuberculosis is completely cleared out, and it doesn’t need any special treatment and therapy. In addition, fibrosis and calcification foci in the idiopathic left upper lung can be treated with glucocorticosteroids, such as dexamethasone and methylprednisolone, and immunosuppressants, such as cyclophosphamide, to prevent the calcification foci in the left upper lung from continuing to develop and spread, which requires treatment.