The feeling of phlegm in the larynx may be caused by laryngitis, respiratory tract infection, gastroesophageal reflux, rhinitis or sinusitis. 1. Pharyngitis: Acute pharyngitis or chronic pharyngitis can cause the mucous membrane of the throat tissue to become congested and edematous, and secretions to increase, so it will always feel like there is phlegm in the throat cavity. It is often accompanied by sore throat, itching, cough and other symptoms. 2. Respiratory tract infection: when suffering from respiratory tract infection, due to external stimulation of the respiratory tract, resulting in congestion and edema of the mucous membrane of the larynx or the surface of the trachea, secretion of a large amount of secretion, resulting in a feeling of phlegm in the larynx. 3. Gastroesophageal reflux: gastric contents reflux to the throat, stimulate the mucous membrane, secretion increases, so there will be always feel phlegm in the throat cavity performance. 4. Rhinitis or sinusitis: when suffering from rhinitis or sinusitis, the nasal secretion increases, and the secretion can be stored in the pharynx when refluxing, resulting in the performance of always feeling phlegm in the throat. There may be other reasons for the feeling of phlegm in the throat, so you need to go to the hospital in time to check the specific cause and treatment, so as not to delay the condition.