<p>Airflow resistance is crucial for optimal pulmonary function during respiration. Nasal airway obstruction may be caused by collapse or obstruction of the internal nasal valve (INV). The objective of this investigation was to assess the internal nasal valve prior to and following turbinoplasty through cross-sectional computed tomography. This prospective clinical study was conducted on 60 adult patients who experienced nasal obstruction that was either partially or completely unrelieved following despite maximal medical treatment. Prior to surgery, each patient underwent a comprehensive medical history, clinical examination, and comprehensive otorhinolaryngological examination. Additionally, an endoscopic assessment of the nasal cavity and cross-sectional CT scan on nose and paranasal sinuses was conducted. There was a significant improvement postoperatively, as postoperative NOSE score was significantly decreased across time till reach 37.4 ± 6.3 at 6 months (<i>P</i> &lt; 0.001). Both postoperative inspiratory and expiratory flow at 6 months were significantly increased compared to preoperative flow (<i>P</i> = 0.028, &lt; 0.001). but no significant change in the nasal valve area and angle on the right and left sides, as well as the average area and angle at (at 0,1 week, 1, 3, and 6 months). Turbinoplasty has no effect on the internal nasal valve area measurements.</p>