Common symptoms of lung cancer 1, cough: irritating dry cough in the lung or the original cough has changed greatly. This may be caused by bronchospasm caused by lung malignant tumor focus. Cough is one of the main symptoms of early lung cancer. 2. Chest pain: The degree of pain in patients with chest pain is different, which depends not only on the severity of the disease, but also on the specific individual quality of the patient. 3, clubbed fingers: clubbed fingers may appear in the common symptoms of lung cancer in the early stage, which means that the joints with toes become hypertrophy, nails will also protrude and bend, and often accompanied by pain, which is also an early symptom of lung cancer that cannot be ignored.