There is always mucus phlegm in the throat without coughing, which may be caused by respiratory diseases, gastroesophageal reflux disease (GERD) or other causes. 1. Respiratory diseases: such as chronic pharyngitis, chronic bronchitis, chronic obstructive pulmonary disease, bronchial dilatation and other diseases, can cause phlegm formation, resulting in the phenomenon of sticky phlegm in the throat. 2. Gastroesophageal reflux disease (GERD): Gastroesophageal reflux can irritate the throat, leading to an increase in local secretions and the formation of mucous phlegm in the throat. 3. Other causes: such as in the cerebrovascular disease sequelae of long-term bedridden, weak, cough reflex is relatively poor, but due to swallowing disorders or aspiration can lead to more phlegm in the throat performance. If the patient has the symptom of sticky phlegm in the throat, it is recommended to go to the hospital to find out the cause of the disease and follow the doctor’s instructions for treatment.