Pharyngitis lesion area exists in the process of continuous inflammatory damage and repair, and may become cancerous when stimulated by risk factors, and this change has no precursor. The symptoms of pharyngeal cancer are also not specific, similar to the symptoms of pharyngitis, which may include hoarseness, pharyngeal discomfort, blood in sputum, pain and so on. 1. Pharyngeal discomfort: patients with pharyngeal cancer have foreign body sensation in the throat or discomfort in swallowing, and always feel that there is a foreign body sensation in the throat or something stuck in the throat. 2. Blood in sputum: pharyngeal cancer may have the symptom of blood in sputum, especially in the first sputum in the morning. 3. Pain: pharyngeal cancer throat pain is obvious, and some patients will have burning sensation. Symptoms of pharyngitis cancer are easily confused with pharyngitis symptoms. If the above symptoms appear, one should go to the hospital for systematic examination in time, so as to check the possibility of cancer by specialized doctors. Normally, standardized medication is also needed to protect the pharynx and try not to eat spicy and stimulating food.