Nasal polyps are known to shrink, in 80% of patients, when nasal sprays or drops containing nasal steroids are used although it can take up to six weeks of treatment before their full effect can be felt.
Nasal polyps blocking the nose can be removed surgically and this often helps the patient to breathe better. In three out of four patients the polyps come back after an average period of four years.
If they return repeatedly the sinuses can be cleaned out and opened up and it is thought that this gives a longer period before they return. Local medical treatment is often still needed using anti-inflammatory sprays or drops.