Rhinology is the branch of medicine that deals with the study and treatment of diseases and disorders of the nose and nasal passages. It encompasses a wide range of conditions including allergies, sinusitis, nasal polyps, nasal septal deviations, nasal tumors, and various other nasal and sinus disorders. Rhinologists are medical specialists who focus on diagnosing and treating these conditions, often employing techniques such as endoscopy, imaging studies, allergy testing, and surgery to manage nasal and sinus problems.