Hoarseness in early stage of lung cancer is considered to be caused by factors such as compression of tumor and invasion of pharyngeal nerve by cancer cells. It is recommended to go to the hospital in time, and if necessary, treat it by surgery, and cooperate with radiotherapy after surgery. 1. Tumor compression: Lung cancer is a malignant tumor of lungs, which usually grows fast, and if the tumor volume gradually increases, it may cause hoarseness. It is recommended to go to the Department of Thoracic Surgery and Department of Otorhinolaryngology and Medical Oncology of the hospital in time. Early stage of the disease can be treated by surgical resection, which can alleviate the symptoms of hoarseness. 2. Cancer cells invade the nerves of pharynx: Lung cancer patients’ own cancer cells invade the nerves of pharynx, which may also lead to hoarseness. It is recommended to remove the cancerous tumor through surgery as early as possible, and postoperative radiotherapy can effectively improve the patient’s symptoms. It is recommended to keep the oral cavity clean and hygienic, reduce the frequency of speaking appropriately, do not be in the environment with dry air, and go to the hospital for diagnosis and treatment when necessary.