If you have phlegm in your throat for a long time, there are several conditions to consider. First of all, the most common is caused by inflammation of the pharyngeal cavity, due to inflammation of the pharyngeal cavity causing congestion of the pharyngeal mucosa, hypersecretion of the submucosal glands and increased phlegm. To avoid spicy and stimulating food, avoid smoking and alcohol, drink more water, you can take oral medication such as Blue Scutellaria Oral Liquid, Golden Lotus Throat Tablets or Sweet Orange Bing Plum Tablets. Secondly, rhinitis and sinusitis can also cause, rhinitis or sinusitis nasal secretions will backflow to the throat cause pharyngeal discomfort and increased pharyngeal secretions, especially sinusitis, discomfort symptoms are more obvious. You can use nasal sprays such as Endosol or Renolcort to spray the nasal cavity 1-2 times a day, 1-2 sprays at a time to reduce the secretion of the glands in the nasal cavity, and the use of pro-discharge drugs to dilute the nasal secretions and promote their discharge, nasal pro-discharge drugs can be used Ceno or Genoton, etc. Finally, the inflammation of the lungs is caused. If patients have obvious symptoms of coughing and sputum, CT examination of the lungs should be performed to clarify the lesions of the lungs, and anti-inflammatory and sputum treatment should be given if necessary.