There are two types of laryngitis: acute and chronic, with some differences in symptoms, and the possibility of cancer is very low. 1. Acute laryngitis: the more common symptoms are dry throat, sore throat, cough, sputum, etc. It is also easy to have burning throat, hoarseness and difficulty in swallowing, etc. Some of the patients will have systemic symptoms, such as fever and fatigue. 2. Chronic pharyngolaryngitis: patients often have symptoms such as foreign body sensation in the throat, itchy throat, hoarse voice, dryness and blockage, etc. Some patients will have nausea and cough due to the secretion of sticky secretion from the posterior wall of the pharynx, which will produce certain stimulation to the pharynx, and many patients will feel that they have phlegm but it is not easy for them to cough it up. 3. Cancer: It is still controversial whether laryngitis will turn into laryngeal cancer. Although inflammation has certain relationship with tumor, and some pre-tumor is caused by inflammatory changes, but it is not absolute, and most of the patients with chronic laryngitis or acute laryngitis will not develop cancer. It is recommended that patients go to the hospital in time, the earlier the treatment, the better the treatment effect, do not let the condition delayed, increasing the difficulty of treatment.