In short. Nostril shape, flare, base width and the sill are separate parts of one complaint, and each answers to a different change. A flared rim is addressed at the rim, a broad floor across the base, and a sill that runs outward through an incision towards the lip.

Key points

  • Flare is the outward tilt of the rim; base width is the distance across the floor.
  • A nose can have a marked flare with a narrow floor, or the reverse.
  • Each component answers to a different incision, and one plan can worsen another finding.
  • The sill extends the base across the face and needs the most visible incision.
  • A base plan cannot rebuild the columella or redesign the opening.

One complaint, four findings

Patients describe one complaint and it usually contains four. The nostrils flare too much, the base is too broad, the openings are the wrong shape, and the skin above the lip runs outward. Those are separate findings with separate answers, and a plan that treats them as one thing tends to over-correct the parts that were never the problem.

Why does the same sentence lead to different plans?

Flare is the outward tilt of the nostril rim, and it is read at the outer edge of each opening. Base width is the distance across the floor of the nose, and it is read as the overall breadth of the lower third. A nose can have a marked flare with a narrow floor, or a broad floor with rims that face almost straight forward. The first is addressed at the rim; the second is addressed across the base. Correcting one when the other is the finding leaves the complaint intact.

Two patients can say the same thing, that the nostrils are too wide, and have different noses. One has a flare at the rim with an ordinary base, and the other has an ordinary rim with a broad floor. Their plans differ, their incisions sit in different places, and one of them would be made worse by the other's operation. The sentence is identical; the noses are not.

The sill: the component people forget

Skin running from the outer nostril towards the upper lip, slanting outward rather than descending, extends the base across the face and gives the nose a wider footprint than its measurement suggests. Correcting it requires the incision to cross that strip, which is the most visible placement available. It is worth correcting when the sill is genuinely a large part of the width, and worth leaving alone when it is not, because the scar is paid for in the open.

Component Where it is read What changing it addresses What it cannot do
The rim and its flare The outer edge of each opening The outward tilt of the nostril Narrow the floor across the base
The floor across the nostrils The breadth of the lower third How far apart the two openings sit Change the shape of the opening itself
The sill The strip from the nostril towards the upper lip The length of the base across the face Correct the width without a visible line
The nostril opening The shape of each opening Part of the shape, as a side effect of narrowing the rim Redesign the opening, which is set by cartilage
The columella The strip between the two openings Nothing, within a base-only plan Be rebuilt by a base plan
Forward projection How far the nostrils project Nothing, within a base-only plan Be changed by a base plan

What the base plan cannot alter

The base plan works on skin and on the soft tissue at the margin. It does not rebuild the columella, the strip of tissue between the two openings, and it does not change how far the nostrils project forward. The underlying shape of the opening is set by cartilages that a base-only plan does not address. A patient whose real complaint is that the openings themselves are the wrong shape, rather than that the base around them is too wide, may be asking for something this operation cannot deliver.

Which parts will the plan name?

A plan built on findings can answer three questions. Which parts are being treated: rim, base, sill, or more than one? Which part is being left alone, and why? If the sill is included, what does that add in visible line, and what does it gain? A plan that answers those three is a plan built on findings rather than on a request, and it is the version of this operation with the fewest surprises afterwards, because every component that was changed was named in advance, and every component left alone was named too.

Sources

Source links open each organisation's search results for the topic. Document-level confirmation is pending the reviewer's sign-off.

Internal links

Frequently asked questions

Can this operation change the shape of my nostril openings?

It changes them partly and unpredictably, because narrowing the rim alters the opening as a side effect. A round opening can become more oval, and a slit-like one can become tighter. What it cannot do is redesign the opening: the underlying shape is set by cartilage and by the columella, which a base plan does not rebuild.

What is the sill, and why does it matter?

It is the strip of skin between the outer edge of the nostril and the upper lip. When it slants outward rather than running down, it makes the whole base look longer and broader across the face, and it is a component many patients have never separated from the rest of the width. It is also the component whose correction is most visible from the front.

Can the two nostrils be made to match exactly?

No, and a plan that promises it is overstating what surgery can do. The two sides differ in the tissue they offer and they heal at slightly different rates, so matching is approached rather than achieved. What is realistic is that a difference which is obvious now becomes one that other people do not notice.

Risks & Limitations

  • The scar is the mechanism of this operation rather than a complication of it. It stays, and it matures over a year or more.
  • Tissue removed from the alar base does not come back, so over-narrowing is difficult to correct.
  • The nostril opening is part of the airway. Narrowing it can reduce breathing, and function comes before width.
  • The two sides are rarely symmetrical to begin with, and a scar behaves worst in skin that tans easily.

When to Seek Care

  • Difficulty breathing through the nose that is worsening rather than settling, or breathlessness at rest.
  • Fever with spreading redness, warmth or discharge around the incision.
  • Bleeding from the incision that does not stop with gentle pressure.
  • A nostril that pulls inward when you breathe in, or an edge that is becoming notched or tethered.

References & Further Reading

  • American Society of Plastic Surgeons (ASPS) — procedure and safety guidance
  • National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
  • Cochrane Library — systematic reviews
  • Chinese Medical Association Plastic Surgery Branch — clinical guidance

Medically reviewed by Tongchun Mao, MD (毛彤春), Deputy Director & Head of Aesthetic Surgery. Last reviewed: 19 September 2026.

This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.