Small pieces of ground glass foci in the upper lobe of the right lung may be infectious diseases of the lung, such as tuberculosis, mycoplasma pneumonia, and alveolitis; or non-infectious diseases of the lung, such as adenocarcinoma of the lung, pulmonary fibroma, and squamous carcinoma of the lung. 1. Infectious diseases of the lungs include tuberculosis, mycoplasma pneumonia, and alveolitis. Generally manifested as cough, fever and other symptoms, anti-inflammatory treatment, inflammation subside will be better. If there are symptoms such as coughing, coughing up sputum, chest pain, hemoptysis, night sweats and so on during sleep, it is considered to be tuberculosis and needs anti-tuberculosis treatment. 2. Non-infectious diseases of the lungs include lung adenocarcinoma, lung fibroma, lung squamous carcinoma and so on. If the nodule is small with clear boundary and regular shape, more observation is enough; if the periphery of the nodule is more chaotic, manifested by symptoms such as cough, chest tightness, hemoptysis, etc., we need to be vigilant against malignant tumors. It is recommended to consult a doctor for a special examination in time to clarify the cause of the disease for treatment.