Lung nodules can be categorized into benign lung nodules and malignant lung nodules, and there are some differences in the symptoms and manifestations caused by different nature of lung nodules. 1. Benign lung nodules: benign lung nodules are caused by fungal infections in the lungs, tuberculosis and other benign lesions, of which tuberculosis can cause coughing, coughing up sputum, blood in the sputum, low fever in the afternoon, night sweats and other symptoms; while the symptoms of fungal infections in the lungs are non-specific, the common ones are fever, chills, headaches, dry coughs, sniffles, chest pain, and so on. 2. Malignant lung nodule: malignant lung nodule refers to lung nodule caused by lung cancer or lung metastatic cancer, and the symptoms that patients may have mainly include chronic cough, hemoptysis, shortness of breath, chest tightness, weight loss and so on. Clinical symptoms caused by lung nodules are closely related to the cause and condition of the disease, and there are many patients who may not have any symptomatic manifestations; individuals who have found lung nodules through imaging examinations must actively cooperate with their doctors to intervene.