Multiple cysts in the nasal cavity are usually caused by infectious stimulation, retention of secretions in the glands, congenital heredity or developmental abnormalities. 1. Stimulation of infection: when the root of the patient’s teeth is stimulated by bacteria or viruses, resulting in cyst-like changes in the apical granulation tissue, causing retention of secretions in the sinus causing multiple cysts in the nasal cavity. 2. Retention of secretions in the glands: The acute and chronic inflammation of the nasal mucosa of the patient causes an increase in the secretion of the glands in the nasal mucosa and obstruction of the discharge, which leads to the retention of secretions in the glands in the nasal cavity, resulting in the emergence of multiple cysts in the nasal cavity. 3. Hereditary or developmental abnormality: due to congenital developmental abnormality, the gland ducts of the patient’s glands are blocked and unable to secrete, leading to retention and inflammation, which may cause multiple cysts in the nasal cavity under the stimulation of inflammatory infection. When patients have symptoms of prolonged nasal congestion, they should go to the hospital in time and receive standardized treatment under the guidance of doctors.