Sinus cysts are treated with nasal corticosteroid spray and are often caused by infection, allergies or sinus irritation, explains WebMD. Physicians may also recommend antihistamines to control underlying allergy problems. In intractable cases, surgery to remove the sinus cysts may be necessary.
Surgical procedures involve using a small nasal endoscope to remove sinus cysts, according to WebMD. The outpatient procedure helps eliminate troublesome cysts while preserving normal tissue in the nose and sinuses. Sinus cysts are often associated with sinus infections, allergic rhinitis, asthma and cystic fibrosis. The condition can lead to sinusitis if left untreated; nasal and sinus cysts are sometimes called polyps.