Immediate:

• Hemorrhage.
• Tear of the submucosal flaps.
• Trauma to surrounding structures such as Turbinates and the Lamina Papyracea.
• CSF rhinorrhea leak due to damage to the cribriform plate.
• Anesthesia complications like cardiac arrhythmias, hypertension.

Delayed:

• 1.Reactionary hemorrhage: This occurs due the wearing off effect of adrenaline and usually occurs within the first 48 hours after surgery.
• 2. Septal hematoma.
• 3. Septal abscess: Result from infected septal hematoma.
• 4. Septal Perforation: It occurs if both the mucoperichondrial flaps are torn at the same site.
• 5. Meningitis: Infection can spread via the ophthalmic veins or cribriform plate causing meningitis or brain abscess.
• 6. Pain may persist for a few weeks in a few cases.
• 7. Septal adhesion and synechiae formation.

Late:

• Atrophic Rhinitis.
• Flapping Septum: This is due to excessive cartilage removal.
• Saddle nose deformity: This occurs due to loss of cartilaginous support over the nasal bridge.
• Columellar retraction: If anterior cartilage strip is removed during surgery this occurs.