Nasal polyps are not allergic rhinitis. Nasal polyps are caused by chronic inflammation of the nasal mucosa, which leads to the formation of proliferative tissue masses on the surface of the nasal mucosa. Allergic rhinitis, due to chronic inflammation and congestion, might also cause the formation of nasal polyps. The main symptoms of nasal polyps include a runny nose, nasal congestion, and headaches. For nasal polyps, the usual treatment involves medication for smaller polyps to control their growth. For larger polyps that significantly block the nasal passages and cause symptoms like headaches and sinusitis, functional endoscopic sinus surgery should be performed promptly to remove the excess polyp tissue and restore normal nasal function.