Solid nodules in the apical posterior segment of the upper lobe of the left lung, inflammatory granulomas, and a slight thickening of both upper pleura are all described on imaging, and it is considered that pleurisy caused by a previous lung infection has resulted in fibrin exudation and deposition of fibrin in the pleura, resulting in a slight thickening of the upper pleura bilaterally. Solid nodule in the posterior segment of the upper lobe of the left lung refers to a dense image with a diameter of less than 1cm, which can be seen in bacterial and fungal infections, tuberculosis, etc. Most of them are benign nodules. Lung infection inflammatory process in order to repair the damaged lung tissue, the surrounding naive connective tissue hyperplasia to form a large number of newborn capillaries, fibroblasts and contains a certain number of inflammatory cells granulation red granular soft tissue, dissolve and absorb the foreign body and fill in the defect, the granulation tissue can be manifested as inflammatory granuloma before maturity. Lung infection can cause pleurisy, pleurisy occurs fibrin exudation, when the fibrin exudation is greater than the dissolution and absorption can lead to deposition in the pleura, later inflammation healing manifested as a slight thickening of bilateral upper pleura. Examination found that the left lung upper lobe apical posterior segment solid nodule, inflammatory granuloma, double upper pleura slightly thickened, we recommend that the patient to the regular hospital in time, so as not to delay the condition.