Concerned about nostril notching? Understanding the extent and limits of alar rim lowering

Alar rim lowering is a surgical procedure that lowers the elevated edge of the nostril to make the notching less noticeable when viewed from the front or at an angle[1]. How much the rim can be lowered depends on the degree of retraction—mild cases may be addressed by adding cartilage alone, but when the inner lining mucosa is insufficient, the procedure involves supplementing the tissue itself[1].

What causes the notching appearance?

A condition where the edge of the nostril appears elevated is called alar margin retraction. It can result from congenital structural characteristics or from complications following previous surgery, such as excessive cartilage removal or damage to the inner mucosa[2]. Severe retraction can make the nasal tip appear pinched, and collapse of the external nasal valve (the airway) may lead to breathing difficulty[1].

Who is a good candidate? Distinguishing mild from severe retraction

For mild to moderate retraction with minimal tissue deficiency, cartilage grafting along the alar margin can restore proper contour.[1] When the outer portion of the rim is significantly elevated, a simple graft may not reach, requiring expanded grafting or additional procedures to advance the inner mucosa.[1] When previous surgery has involved excessive resection of the nasal base with resultant scarring and contraction, correction requires en bloc grafting of skin and cartilage.[3].

How much can it be lowered? Factors determining descent distance

The amount of descent is determined by two factors: where the supporting lateral cartilage is located and how much laxity exists in the inner lining mucosa.[2] When cartilage is displaced cephalad from its normal position, less force can be applied to lower the rim, requiring repositioning of the cartilage itself.[2] Attempting to lower the rim without sufficient mucosa will result in contraction against the descent force, so supplementing the deficient mucosa must precede lowering.[1].

Will breathing difficulty improve?

When retraction is severe and the external nasal valve is collapsed, lowering the rim and adding structural support can restore the airway contour.[1] However, nasal obstruction often has multiple causes—such as septal deviation or mucosal swelling—and may persist even after addressing the external structures.[2] If breathing difficulty is the primary concern, investigation of the underlying causes should take priority over aesthetic considerations.

What risks and recurrence should be monitored?

Key concerns include visibility of the graft cartilage edge, asymmetry in height between sides, and gradual elevation over time.[1] In patients with thin skin and weak cartilage, structural augmentation grafting itself has been reported to potentially compromise nasal tip contour.[3] A retrospective review of aesthetic nasal surgery overall found that 9.8% underwent revision, so planning with the possibility of a staged approach allows for better decision-making.[4].

What to confirm during consultation

The consultation focuses on three areas: the degree of retraction, the available laxity of the inner lining mucosa, and the donor site for graft material.[1] If you have undergone previous nasal surgery, what was done then affects which tissues can be used, so bringing any surgical records will expedite the discussion.[4] Since the appearance of notching changes with viewing angle and facial expression, communicating which direction concerns you most helps the surgeon provide an individualized assessment.