There is no quick solution to the problem of backflow of nasal mucus into the throat, i.e. postnasal drip syndrome. Backflow of nasal mucus into the throat may be caused by sinusitis, acute rhinitis, chronic rhinitis, allergic rhinitis, etc., and requires targeted treatment according to the specific disease causing the backflow of nasal mucus into the throat. 1. Sinusitis: If sinusitis causes the symptoms of backflow of nasal mucus to the throat, you can use budesonide nasal spray, nasal abundance of Shu oral solution, eucalyptus pineapple intestinal soft capsule, clarithromycin tablets and other treatments; standardized conservative treatment is not effective, you can choose to endoscopic sinus surgery treatment. 2. Acute rhinitis: Due to the symptoms of acute rhinitis that causes nasal mucus to flow back to the throat, you can use rhinitis tablets, ribavirin tablets, etc., and you can also use topical budesonide nasal spray and other medications for treatment. 3. Chronic rhinitis: this is due to the increase in inflammatory secretion caused by symptoms, can be used locally mometasone furoate nasal spray, budesonide nasal spray and other drugs, but also can be low-temperature plasma inferior turbinate ablation, inferior turbinate partial resection and other surgical methods for treatment. 4. Allergic rhinitis: If allergic rhinitis causes the symptoms of backflow of nasal mucus to the throat, you can use budesonide nasal spray, mometasone furoate nasal spray, etc., or oral loratadine tablets, cetirizine hydrochloride tablets, etc., and in severe cases, you can carry out pterygoid neurectomy and other methods of treatment. When using medication, it should be standardized under the guidance of a professional physician, and if adverse reactions occur, it is recommended to go to the hospital in a timely manner, so as to carry out regular treatment as soon as possible.