After smoking for a long time, the smoke stimulates the mucous membrane of the throat and affects the physiological function of the mucous membrane of the throat, resulting in congestion and swelling of the mucous membrane, and a decrease in the secretion of glands on the surface of the mucous membrane, resulting in dryness of the mucous membrane of the throat and a feeling of discomfort such as a foreign body and blockage in the throat. For those who develop a foreign body sensation in the throat after long-term smoking, a detailed examination of the mucous membrane of the throat for malignant tumour growth is required to avoid missing the diagnosis and affecting the patient’s treatment.