Nasal cysts usually refer to sinus cysts. When the cysts are small and asymptomatic, they can be left untreated and can be observed and followed up regularly. If the cyst is large or causes symptoms, such as headache, facial numbness, loss of smell, protruding eyes, nasal congestion, etc., then surgical treatment is required. Sinus cysts refer to cysts in the sinuses, which can be located in the maxillary sinus, sieve sinus, butterfly sinus and frontal sinus, causing slightly different symptoms. Once diagnosed, patients usually need prompt treatment.