Pharyngeal cancer is very likely to cause hoarseness. Hoarseness is a typical symptom of pharyngeal cancer, which will be aggravated with the development of the disease, accompanied by sore throat, difficulty in swallowing, bleeding in throat and other symptoms. However, hoarseness is not necessarily a symptom of throat cancer, but may also be caused by benign laryngeal diseases, such as inflammation of larynx, inflammation of vocal cords, polyp of vocal cords, cyst of vocal cords, compression or lesion of laryngeal reentrant nerve, etc. If hoarseness occurs suddenly, it is not necessarily a symptom of throat cancer. If the symptoms of hoarseness appear suddenly and last for a long time without recovery, it must cause alarm, and it is recommended to go to the otorhinolaryngology department of regular hospitals as soon as possible for consultation and examination, such as laryngoscopy, etc., and further cooperate with the doctor to do pathological biopsy if necessary, so as to exclude the possibility of malignant tumors of larynx in a timely manner.