This article addresses the challenge of persistent nasal airway obstruction following septoplasty, specifically as it relates to revision septoplasty. Emphasis is on the importance of and the steps to be taken in making a complete and correct diagnosis of the problem before any surgery is performed. The authors present two categories of revision surgery: surgery involving the cartilaginous septum and surgery involving the bony septum, because they believe the evaluation and management of these areas are distinct. This article presents a discussion of airflow dynamics, options to objectively assess nasal volume and patency, examination of the septum, and surgical approaches and techniques.