Coughing with phlegm and throat tickling may be caused by acute pharyngitis, chronic pharyngitis, acute bronchitis and other reasons. 1. Acute pharyngitis: usually caused by bacterial or viral infection of the mucous membrane of the throat. When bacteria and viruses attack the mucous membrane of the throat, they cause an acute inflammatory reaction, and under the stimulating effect of inflammation, it leads to an increase in the secretion of the pharynx, which in turn causes itchy throat and coughing with phlegm. 2. Chronic pharyngitis: Acute pharyngitis repeated episodes, adverse physical and chemical factors stimulation and other factors caused by the pharyngeal mucosa and submucosal tissues of the chronic inflammatory reaction, there can be a cough, phlegm and throat itching symptoms. 3. Acute bronchitis: the disease is usually caused by acute upper respiratory tract infections that are not effectively treated, resulting in the spread of pathogenic bacteria to the lower respiratory tract. Because of the continuity of the mucous membrane of the respiratory tract, the pharynx will also be affected by the disease coughing, coughing up phlegm, causing the throat itching discomfort. Coughing up phlegm and throat tickling may also be related to other factors, if the symptoms continue to be unrelieved, it is recommended to consult a doctor as soon as possible for a definitive diagnosis.