The symptoms of malignant lung nodules vary in severity and are related to patients’ specific conditions. For example, patients with early malignant lung nodules may not have any clinical symptoms and are only detected during CT physical examination of the lungs. For most patients with malignant lung nodules, i.e. lung cancer, clinical symptoms include cough, chest pain, fever, systemic symptoms, metastasis of cancer cells, etc., as follows: 1. Cough: Most patients have different degrees of cough, mostly irritating dry cough or accompanied by a little white mucous sputum. Patients with lung cancer may also have blood in sputum or hemoptysis repeatedly.2. Chest pain and fever: Sometimes, chest pain and chest tightness of different degrees may occur, and some patients may have cancer fever.3. Systemic symptoms: For patients with intermediate or advanced lung cancer, weight loss and loss of appetite may also occur.4. Cancer cell metastasis: When intrapulmonary or distant metastasis occurs in malignant nodules of lung, there may be related clinical manifestations, such as wheezing, dysphagia, dysphagia, metastasis, etc. for example, wheezing, dysphagia, bone pain, intracranial metastasis and other symptoms.