The pterygoid sinus is normally an air-containing cavity with a normal natural opening. If the patient often has a lot of nasal mucus after a cold or has allergic rhinitis or hypertrophic rhinitis, the nasal mucus often fills the nasal cavity, sometimes leading to the presence of a large amount of purulent secretions inside the patient’s pterygoid sinus. If the patient’s pterygoid sinus opening is not good, it will easily lead to the accumulation of mucous pus inside the pterygoid sinus cavity to form pterygoid sinusitis. If the patient’s pterygoid sinus opening is good, the normal accumulation of fluid inside the pterygoid sinus can be discharged on its own, and if necessary, patients are advised to apply medication. The common ones are eucalyptus pinene enteric soft capsule, cefdinir dispersible tablets, celestina rhinitis drops or rhinitis kang tablets, etc. Patients can selectively apply them.