The causes of itchy throat with phlegm are as follows: 1, often related to chronic inflammatory diseases of the mucous membrane of the throat, inflammation will lead to the mucous glands of the throat, secretion of mucus or even mucopurulent secretions, easy to adhere to the surface of the mucous membrane of the throat, resulting in phlegm plugging and other uncomfortable symptoms; 2, patients often have a relatively dry condition of the mucous membrane of the throat; 3, may be combined with the presence of allergic factors, which can cause itchy throat. This can cause itching in the throat area and even lead to repeated coughing. The occurrence of these symptoms is related to the patient’s excessive use of voice, and may also be related to more smoking, drinking, eating spicy and stimulating food, and prolonged exposure to air pollution, etc. It is necessary to pay attention to active treatment and improvement, and to avoid these possible causative or influencing factors.