Sinusitis can be completely cured. Sinusitis, also known as rhinosinusitis, is a condition caused by bacterial infection due to weakened immunity and resistance. Typically, patients may experience sudden high fever with a body temperature above 38°C, dryness and pain in the nasal cavity, and yellow discharge might be present in the nose. Examination can reveal congestion and significant edema of the bilateral middle and inferior turbinates, and abnormal secretions may be found in the middle meatus or common nasal passage. In terms of treatment, since it is a bacterial infection, patients can orally take cephalosporin or penicillin antibiotics, which are effective. Additionally, nasal irrigation with saline solution is necessary. If conservative treatment fails, patients may need to undergo endoscopic sinus surgery and sinus mucosa cleaning to achieve complete recovery. (Medications should be used under the guidance of a doctor.)