Small nodules in the upper lobe of the left lung refers to the appearance of small nascent tissues in the tissues of the upper lobe of the left lung, which may have tuberculosis ball, inflammatory tissues, tumor tissues, silicosis nodules and so on, and most of them are not serious, and can be observed. Tuberculosis ball is due to previous patients have tuberculosis is not effectively controlled, the formation of caseous changes in the formation of mass-like tuberculosis ball or blood dissemination type of tuberculosis nodule proliferation, relatively serious, need to formal tuberculosis specialist consultation and treatment. Inflammatory tissue mass is due to long-term local chronic inflammation of lung tissue can not be effectively controlled, stimulate the formation of newborn inflammatory lung tissue mass, can be appropriate antibiotic anti-inflammatory treatment, generally not serious. Tumor tissue in the lungs may be primary or metastatic tumor tissue, which is more serious and requires early specialized treatment. Silicosis nodules are all kinds of dust particles in the environment in which they have been living for a long time, which enter the human body due to the phagocytosis of macrophages, and then form nodules or masses, and the disease is very serious in the later stage, which is difficult to treat. If you find a small nodule in the upper lobe of the left lung, it is recommended to go to the thoracic surgery department of a regular hospital, and be evaluated and guided by a professional doctor for treatment.