There are many causes of phlegm in the throat at night, such as respiratory diseases, such as pneumonia, bronchitis, tuberculosis, lung tumors, cough variant asthma, bronchodilatation, lung abscess, etc. Other diseases include pharyngitis, cardiac insufficiency and so on. If the patient has phlegm in the throat, it is recommended to actively seek medical treatment, further improve the relevant examination to clarify the diagnosis, clinically can take symptomatic treatment as well as causative treatment, when there is phlegm coughing can be used to expectorate drugs, including Mucosolvan, eucalyptus-pinocampus enteric soft capsule, acetylcysteine and so on. The causative treatment can also be taken to improve the blood routine and other related tests to assess the possible infection of the causative organisms, and according to the diagnosis and the causative organisms to take further treatment, for example, bacterial infections need to use antibiotic treatment, cardiac insufficiency needs to be treated with anti-heart failure.