Common causes of itchy throat, cough and phlegm include: long-term smoking, chronic bronchitis, bronchial dilatation, upper respiratory tract infections and so on. 1. Long-term smoking: due to smoke and other physical stimulation of the pharyngeal mucosal sensory nerve endings, which in turn can induce an itchy throat. Long-term smoking will also repeatedly stimulate the airway, resulting in coughing and phlegm. 2. Chronic bronchitis: mostly associated with long-term stimulation of infectious and non-infectious factors, the disease is slow onset, long duration, the common clinical manifestations of cough, cough sputum, or with wheezing, shortness of breath, itchy throat and so on. The main treatment principles are cough suppression, expectorant, asthma, anti-infection. 3. Bronchial dilatation: Usually due to repeated infections, inflammation and other factors causing irreversible bronchial dilatation. Patients often have persistent or repeated cough and sputum. The sputum is usually yellowish-green, mucous and purulent. Due to bronchial dilatation will cause bronchial injury, and bronchial injury will stimulate the throat area, which will lead to the performance of itchy throat. 4. Upper respiratory tract infections: mainly caused by viral and bacterial infections, inflammatory mediators will stimulate the mucous membrane of the pharynx, resulting in increased secretions, which in turn cause itchy throat, cough, phlegm performance. Itchy throat, cough, phlegm can be seen in a variety of reasons, it is recommended to go to the regular hospital in a timely manner, to clarify the cause of the disease and targeted treatment.