Duck lips: causes, prevention and management

The "duck lip" became known as the mark of badly done lip filler: a projected, inflated upper lip, with a pointed center and a contour out of proportion to the rest of the face. The patient who arrives with this complaint is usually embarrassed, and the professional who receives them needs two skills: understanding how it happened and knowing how to correct it without making it worse.

This text covers causes, prevention and management, without describing injection technique. For the basics, see the lip filler procedure and the lips area. Related pages: asymmetric lips: assessment, thin lips: assessment and filler above the lip: migration.

What characterizes duck lips?

The term describes a combination of findings, and not all of them need to be present:

• Excessive forward projection of the upper lip, which "sticks out" from the plane of the face.
• Eversion of the upper vermilion, leaving the lip turned upward.
• Disproportion between the upper and lower lip, with the upper dominant. See lip proportion.
• Philtrum shortened or flattened, and a deformed or exaggerated Cupid's bow.
• Elevated, rigid contour, sometimes with a visible line at the transition with the skin.
• Artificial movement when speaking and smiling, with a lip that lacks flexibility.

Some of these signs appear transiently in the first few days, because of swelling. The diagnosis of duck lips should only be made after the swelling has subsided enough.

Why does it happen?

The causes combine, and knowing them helps with prevention.

1. Disregard for proportion. The lower lip is usually a bit larger than the upper in many faces, but the proportion varies with profile, gender and ethnicity. Enlarging the upper beyond the lower inverts the harmony.
2. Excess volume in the center. Concentrating product in the lip tubercles and the center of the upper vermilion creates the "beak" effect.
3. Contour raised too high. Projecting the vermilion line upward lengthens the lip and turns it outward.
4. Shortened philtrum. The volume pushes the lip up and forward, shortening the philtrum.
5. Unsuitable product. Materials that are very firm or very volumizing do not project well in the lip and create rigidity.
6. Migration. Part of the gel can move outside the vermilion over time. See filler above the lip: migration and hyaluronic acid migration.
7. Patient pressure. The request for "big lips", without assessing the face, pushes the professional toward excess.
8. Anatomy not considered. Profile, nasolabial angle, teeth and support of the lower third influence the final look.

How to prevent it?

Prevention is cheaper than correction and goes through three steps: assessment, amount and conversation.

• Assess from the front and in profile, at rest and in movement. Consider the nasolabial angle, chin and nose projection and incisor exposure. See nasolabial angle and incisor exposure.
• Respect the natural design: Cupid's bow, philtrum, corners and the upper/lower relationship. See hyaluronic acid in Cupid's bow and in the philtrum.
• Use little at a time. Starting conservative and touching up later is safer than correcting an excess.
• Match the product choice to the need: the lip calls for a soft, moldable product. See filler firmness.
• Talk about naturalness and about what the patient calls "beautiful". Reference photos help, but they need to be translated to the patient's own face. See I want bigger lips.
• Document the before, at rest and smiling. See standardized clinical photography.

What to do about a lip that already looks like a duck bill?

Management depends on timing, cause and product. A reasoning outline, without technical step-by-step:

Hyaluronidase: when and how to think about it

Hyaluronidase breaks down hyaluronic acid and can be used to reduce an excess volume. In the lip, there is a risk of dissolving too much and leaving the lip thin or irregular, and the patient must be warned. Local reaction and the possibility of allergy are discussed in local reaction to hyaluronidase and hyaluronidase: allergy and testing. The broader reasoning is in dissolving filler: criteria for indication and hyaluronidase in the office.

When to wait

In many cases, waiting is the best approach: the swelling subsides, the gel settles, the lip loses rigidity. Set a reassessment date and use photos to compare. Patients accept waiting better when they know what is being observed and when they will be reassessed.

When it is not the product

If the "beak" complaint persists even with little volume, think of structural causes: projected teeth, nasal base, maxillary support, recessed chin. Referral to orthodontics or other specialties may be appropriate. See orthodontics and facial profile in orofacial harmonization.

What about the associated risks?

Correcting a lip also involves risks. The most important:

• Vascular event, rare but serious, because of the labial arteries. See lip vascular occlusion.
• Tyndall effect and irregularities, see Tyndall effect in the lips.
• Prolonged swelling, bruising and asymmetry.
• Reaction to the product or to hyaluronidase.
• Frustration with the result, when the lip ends up smaller than desired.

And in Harmy?

Summary

Duck lips come from disproportion, excess in the center and an elevated contour. Prevent them with an assessment of the whole, small volumes and a conversation about naturalness. If it happens, wait for the swelling to subside, identify the product, consider hyaluronidase when it is hyaluronic acid, correct in moderation and follow up with photos.