Sinusitis is an inflammation of the sinuses, divided into two types: one with nasal polyps, known as chronic sinusitis with nasal polyps, and one without nasal polyps, known as chronic sinusitis without nasal polyps. If it is chronic sinusitis with nasal polyps, functional endoscopic sinus surgery should be performed to remove the swellings, open the ethmoid sinuses, and treat with medication. If it is chronic sinusitis without nasal polyps, clinically, antibiotics and anti-allergy medications can be used, along with some topical corticosteroids. Avoid spicy and irritating foods, and drink plenty of water. The treatment duration for chronic sinusitis should be at least three months, and care should be taken to avoid colds, staying up late, and overheating. (Specific medications should be taken under the guidance of a physician.)