An itchy nose is not a precursor to lung cancer. Lung cancer is the most common primary malignant tumor of lung, originating from trachea, bronchial mucosa or glands. Clinically, it mostly manifests as cough, blood in sputum, hemoptysis, wheezing and chest pain, so itchy nose is not a precursor of lung cancer. When patients have symptoms of itchy nose, they are mostly related to acute rhinitis, vasomotor rhinitis and other diseases. There may also be physiological reasons, such as being in a dusty environment, which can also cause itchy nose symptoms. Acute rhinitis is an acute inflammatory disease of the nasal mucosa caused by viral infection, which can occur in all seasons and is more common in winter, when the peripheral nerves of the nasal mucosa are stimulated by inflammation, which can lead to itchy nose symptoms. Vasomotor rhinitis is a neurotransmitter-mediated neurogenic inflammation of the nasal mucosa, mainly due to autonomic nervous system dysfunction, nasal mucosal sensory nerve endings release neuropeptide induced neurogenic inflammatory response, there will be symptoms of itchy nose. If the patient has the symptom of itchy nose, after excluding the physiological causes, he should go to the hospital for examination, to clarify the specific cause of the disease, and under the guidance of the doctor’s treatment.