Phlegm at the junction of nasal cavity and pharynx needs to be treated according to the specific causes, such as rhinitis, sinusitis, nasopharyngitis, etc. After diagnosis, you can choose general treatment and medication. 1. Rhinitis: Rhinitis can cause phlegm at the connection of nasal cavity and pharynx, accompanied by nasal congestion and runny nose. For treatment, nasal sprays and saline can be used as prescribed by the doctor to improve symptoms, such as mometasone gluconate nasal spray and budesonide nasal spray. Sea saline can dilute mucus, mucous phlegm, improve symptoms. 2. Sinusitis: Sinusitis will appear a large number of purulent secretions, from the post-nasal drip leakage can be caused by the nasal cavity and pharyngeal connection with phlegm. Treatment can choose antibiotic treatment, such as cefadroxil, amoxicillin, at the same time with nasal spray drugs, such as budesonide nasal spray. 3. Nasopharyngitis: Nasopharyngitis can cause local tissue congestion, swelling, causing nasal secretions overflow, resulting in phlegm in the connection between the nasal cavity and the pharynx. For treatment, you can choose nasal physiological sea saline rinsing, and at the same time with nasal spray treatment, such as mometasone glycolate nasal spray, can also be applied to nasopharyngeal clearing particles and other proprietary Chinese medicine treatment. After the symptoms of phlegm in the connection of nasal cavity and pharynx appear, it is recommended that the patient go to the hospital in time, improve the examination under the guidance of the doctor, and take standardized treatment, and all of the above drugs need to be applied under the guidance of the doctor.