If there is a lot of phlegm and nasal congestion, the following conditions should be considered. It may be caused by upper respiratory tract infection, which is mostly caused by bacterial and viral infections and can cause symptoms such as nasal congestion, runny nose, sneezing, coughing and coughing up phlegm. You can give cephalosporin or azithromycin anti-inflammatory treatment, give anti-sensory detoxification flush and other drugs antiviral treatment, the condition gradually relieved in about a week. In addition, it is caused by rhinitis or nasal swelling, such as rhinitis, sinusitis, nasal polyps, etc. If the patient has rhinitis or sinusitis, the secretions in the nasal cavity will back up into the pharyngeal cavity causing symptoms of phlegm, you can use nasal sprays, such as endosonar, Renolcort, etc., spray the nasal cavity 1-2 times a day, 1-2 sprays a time to reduce the secretion of glands in the nasal cavity, and treat with pro-discharge drugs such as Chenault or Genotone. If nasal polyps, papillomas and other new organisms are found in the nasal cavity, sinus CT and nasal endoscopy can be done to further clarify the diagnosis, and surgery is needed if necessary.