Supernumerary teeth are defined as any teeth that appear in addition to the regular number of teeth and can occur in any region of the dental arch including the nasal cavity. We present a case of a supernumerary tooth in an inferior turbinate and highlight important aspects of its management. A 14-year-old male presented with a three-year history of persistent right nasal obstruction and recurrent mucopurulent rhinorrhea from the right nostril. Occasional chemosis of the right eye was noted. The patient had previously revealed a history of ectopic tooth in the contralateral nasal cavity, which was surgically removed. Examination revealed a severe right-sided nasal septal deviation with a large tooth located in the head of the inferior turbinate. The inferior turbinate was abnormally enlarged, obstructing the entire right nasal cavity. Cross-sectional imaging showed a left anterior intranasal ectopic tooth at the inferior turbinate, with a horizontally oriented crown and an associated smooth mucocele at the root of the supernumerary tooth, causing secondary widening and obstruction of the nasolacrimal duct. The patient underwent endoscopic removal of the supernumerary tooth and inferior turbinate reduction. The postoperative course was uneventful, and symptoms resolved completely. Histopathological examination revealed a normal tooth and dermoid cyst formation. An inverted supernumerary tooth erupting into the nasal septum is exceedingly rare. Detection of intranasal or intraseptal teeth can be variable, ranging from an obvious finding on anterior rhinoscopy to nonspecific symptoms requiring radiological evaluation. Ectopic teeth found in the nasal cavity can be permanent, deciduous, or supernumerary, and the majority originate from dentigerous cysts. The standard treatment for an ectopic tooth in the nasal cavity involves surgical removal, with approaches including endoscopic sinus surgery or the Caldwell–Luc procedure.The use of CT imaging is invaluable for diagnosis and surgical planning.