The phenomenon of itchy throat and coughing with slight blood may be caused by laryngitis, pharyngeal tumor and other reasons. 1. Pharyngitis: chronic pharyngitis, allergic pharyngitis, reflux pharyngitis, due to long-term stimulation of inflammatory factors and reflux pharyngitis, resulting in congestion and edema of the mucous membrane of the throat, which may cause itchy throat, accompanied by coughing and other symptoms; pharyngeal mucous membrane due to inflammatory reaction, mechanical damage or physical and chemical factors can be stimulated by the sputum with the phenomenon of blood in the pharyngeal mucous membrane. 2. Pharyngeal tumor: such as nasopharyngeal cancer, laryngeal cancer, etc., patients may cough up sputum, hemoptysis, sore throat and other symptoms. If the above symptoms occur, it is recommended to consult doctor in time to find out the cause of the disease and actively cooperate with doctor for standardized treatment.