Key Summary
Lip filler adds missing volume and definition, while mouth-corner Botox reduces the force of muscles pulling the corners down. When both issues are present, a consultation can address combined treatment; deep lines beside the mouth and sagging skin require their own assessment. Filler shape is assessed after swelling subsides, and Botox-related movement is assessed after 1–2 weeks. Patient accounts describe satisfaction with shape and expression, alongside swelling, limited perceived benefit and asymmetry.
How do lip filler and mouth-corner Botox differ?
Filler adds volume; Botox changes muscle activity. Hyaluronic acid lip filler adjusts thickness, definition and the balance between the two sides. It is also used to expose an inward-rolling lip or fill hollow areas near the corners.
Mouth-corner Botox targets the depressor anguli oris, or DAO, which pulls the mouth corners downward. Reducing that downward force changes its balance with the muscles that raise the corners. DAO anatomy and clinical study, PMID 35139057
| Comparison | Lip filler | Mouth-corner Botox |
|---|---|---|
| Main target | Lip thickness, definition and hollow areas | Downward pull at the mouth corners |
| Concern to discuss | Thin or inward-rolling lips, indistinct outline, uneven volume | Corners that turn down at rest or during speech |
| Assessment | Shape and volume after swelling subsides | Direction and left–right movement during expression |
| Main burdens | Bruising, swelling, lumps, excessive volume | Asymmetry, discomfort with smiling or mouth movement |
Comparison checked October 26, 2026.
Distinguish a lip flip, which may also be advertised as “lip Botox.” It relaxes muscles around the upper lip so an inward-rolling lip becomes slightly more visible. Its target differs from DAO treatment, so ask which area the proposed procedure will change and how. Cleveland Clinic lip-flip guide
What matters at rest and when smiling?
The clinician assesses the resting shape together with movement during smiling and speech. Someone whose corners look downturned at rest but rise evenly when smiling has different concerns from someone with a stronger downward pull on one side during speech. A single photograph is also affected by expression and camera angle.
One Gangnam Unni reviewer was concerned that only one corner dropped when smiling.
Gangnam Unni, mouth-corner Botox, September 18, 2025
한쪽에 보톡스를 맞았는데 너무 만족합니다
English translation: I had Botox on one side and am very satisfied.
Source: Gangnam Unni mouth-corner Botox reviews. Excerpt from the review.
The side and amount to inject are determined by examining movement on both sides.
The lip assessment includes not only overall thickness but volume at each end, inward rolling and the lip outline.
Do deep lines below the mouth corners need the same treatment?
Deep vertical lines and hollows immediately below the mouth corners are assessed separately from lip thickness. These are often called marionette lines. Downward muscle pull, loss of volume around the mouth and sagging skin or tissue can overlap. Simply making the lips fuller leaves the groove below them unaddressed.
Yeppeunna Clinic published an actual before-and-after case involving perioral lines and mouth-corner asymmetry. The before image shows grooves extending below the mouth corners. The treatment combines filler for marionette and perioral lines, Botox for asymmetric mouth corners, and chin Botox. The after image shows a smoother contour around the mouth.
The photographs were taken in 2024–2025. Yeppeunna Clinic case
If this resembles your concern, ask: “Can you address the hollows beside and below the corners without making my lips thicker?” If the skin is substantially loose, ask what injections will change and how much sagging will remain.
Do I need both procedures?
Combined treatment is considered when both volume loss and downward muscle pull are concerns. If you like your lip shape and only want to address muscle pull, discuss Botox alone. If movement is satisfactory but the lips are thin or inward-rolling, first decide which areas need filler.
A Babitalk user had both procedures at Chamin Plastic Surgery. They asked to retain their original shape and avoid lips that projected too much, then reported satisfaction with the shape and volume.
Babitalk, combined lip filler and mouth-corner Botox, treatment date October 22, 2026
입술모양, 볼륨감 제가 원하던대로라 만족합니다^.^
English translation: The lip shape and volume are just what I wanted, so I am satisfied ^.^
Source: Babitalk mouth-corner Botox search results. Excerpt from the review.
A clinical trial of the perioral area and lower face also reported benefits of combined treatment. Ninety women aged 35–55 were assigned to filler, Botox or both, with 30 in each group; the combined group improved more on several assessments. These patients were treated for lip volume and perioral aging. Whether someone concerned only about mouth corners needs both requires an individual assessment. Direct comparison, PMID 21134044
When discussing the sequence, ask: “Why would I need both on the same day? Could I have one first and add the other after assessing the remaining concern?”
When do results appear, and how long do they last?
Filler changes volume immediately, while the muscle effect of Botox develops over several days. Onlif Clinic advises that mouth-corner Botox starts working in 3–7 days, becomes clearer at 1–2 weeks and lasts an average of 3–4 months. Repeat timing depends on the return of muscle pull and any previous discomfort. Onlif Clinic timing guide
Gangnam Unni, mouth-corner Botox, October 3, 2026
이번에 효과가 적은 느낌..ㅠ
English translation: It feels less effective this time..ㅠ
Source: Gangnam Unni mouth-corner Botox reviews. Excerpt from the review.
If the result feels weak, tell the clinic how many days have passed and which expressions still produce a downward pull. Product-related issues or resistance require clinical assessment.
Lip-filler duration advice also differs by product and assessment criteria. Repic Clinic suggests maintenance at 6–12-month intervals, while Cleveland Clinic gives a typical duration of 12–18 months. Wanting another treatment is different from the injected product having completely disappeared. Have remaining volume and lumps assessed before adding more. Repic Clinic guide, Cleveland Clinic guide
During follow-up, look at mouth-corner direction and symmetry when smiling, as well as lip volume. Review of mouth-corner correction
How long do swelling and bruising last? Can I work the next day?
Swelling can make the lips look fuller and uneven immediately after filler. Cleveland Clinic advises that swelling usually settles within 24–48 hours but may last a week, with reassessment at about 2 weeks. Allow for this recovery before important photographs or events.
Babitalk, lip-filler experience, treatment date not entered
시술 직후 약간 붓기는 있었지만 점점 자연스러워졌어요
English translation: There was some swelling right after treatment, but it gradually looked more natural.
Source: Review included in Babitalk mouth-corner Botox search results. Excerpt from the review.
This was a Dress Plastic Surgery Clinic user's lip-filler account; the review card also lists Botox.
If your work involves frequent speaking, consider possible changes in expression and speech after Botox. Wait to eat while the lips are still numb to avoid biting them, and do not press or massage the area yourself. Follow the instructions for your procedure on lip products and resuming exercise. Lip-filler recovery guide
What if my smile feels awkward or one side changes?
Contact the treating clinic for an examination if new asymmetry or difficulty moving your mouth develops. Muscles controlling the lower lip lie close to the DAO. If the drug affects nearby muscles, it may alter smile symmetry or make speech and drinking uncomfortable. DAO study, Onlif Clinic explanation
Gangnam Unni, mouth-corner Botox, January 18, 2026
다만 비대칭 부작용이 생겨서 시술 후 문의드렸고 바로 리터치 일정 잡아주셔서 재방문했습니다.
English translation: However, I developed asymmetry, so I contacted them after treatment. They promptly arranged a touch-up appointment, and I returned.
Source: Gangnam Unni mouth-corner Botox reviews. Excerpt from the review.
The reviewer resumed everyday activities immediately and was satisfied with the clinic's response and the result after returning. New asymmetry requires assessment of which muscle movements have changed before deciding how to respond.
Beyond bruising and swelling, filler carries risks of lumps, excessive volume, infection and blocked blood vessels. Severe unusual pain, white, gray or blue discoloration of the lips or surrounding skin, and vision changes require immediate medical care. Difficulty breathing or swallowing also requires emergency care. FDA filler safety guide, Botulinum-toxin-related emergency symptoms
Hyaluronic acid filler can be reduced with a dissolving enzyme, but removal also has risks and requires further care. Botox cannot be immediately reversed with a filler-dissolving drug. At the first consultation, explain how much change in your expression you want to avoid.
What should I include when comparing prices?
Separate Botox-only prices, lip-filler prices per 1 cc and prices for combined treatment. Products advertised for “mouth corners” differ in filler brand, amount and touch-up coverage. The options below were checked on October 28, 2026; every amount includes VAT.
Individual mouth-corner Botox and lip-filler options
| Clinic and seller | Option | Including VAT |
|---|---|---|
| Platinum Clinic, Gangnam Unni | Mouth-corner Botox, Bienox, 1 session | KRW 40,000 |
| Platinum Clinic, Gangnam Unni | Mouth-corner Botox, Xeomin, 1 session | KRW 70,000 |
| Thank You Plastic Surgery Clinic, Modoodoc | Atier lip filler, 1 cc | KRW 88,000 |
| Thank You Plastic Surgery Clinic, Modoodoc | Restylane lip filler, 1 cc | KRW 297,000 |
Sources: Platinum Clinic options on Gangnam Unni, Thank You Plastic Surgery Clinic options on Modoodoc.
Combined lip filler and mouth-corner Botox
| Clinic and seller | Option | Including VAT |
|---|---|---|
| Platinum Clinic, Gangnam Unni | Atier 1 cc + Bienox mouth-corner Botox | KRW 130,000 |
| Platinum Clinic, Gangnam Unni | Restylane Kysse 1 cc + Bienox mouth-corner Botox | KRW 340,000 |
| Repic Clinic Gangnam Main Branch, website | Atier 1 cc + mouth-corner Botox | KRW 209,000 |
| Repic Clinic Gangnam Main Branch, website | Design filler, Restylane/Belotero 1 cc + mouth-corner Botox | KRW 429,000 |
| Repic Clinic Gangnam Main Branch, website | Restylane Kysse 1 cc + mouth-corner Botox | KRW 495,000 |
| Dress Plastic Surgery Clinic, Gangnam Unni/Babitalk | Lip filler + mouth-corner filler + mouth-corner Botox total set, 1 session | KRW 242,000 |
Repic Clinic Gangnam Main Branch lists the three options at KRW 190,000, 390,000 and 450,000 before 10% VAT. The table shows calculated totals including VAT. The Dress Plastic Surgery Clinic set also includes mouth-corner filler; its Gangnam Unni option includes touch-up, anesthesia and aftercare. When using Babitalk, ask which quantities and touch-up terms apply to your visit.
Sources: Repic Clinic Gangnam Main Branch options, Dress Plastic Surgery Clinic set on Gangnam Unni, Dress Plastic Surgery Clinic set on Babitalk. Gangnam Unni lists the set through January 31, 2027; Babitalk lists it until the event ends.
When requesting a quote, ask whether 1 cc is shared between the lips and corners or allocated separately to each area. Whether a touch-up includes additional filler or only a follow-up visit affects the total. Also ask about unused product and removal costs.
What should I ask at the consultation?
- Is muscle pull, volume loss or skin sagging the main reason my mouth corners look downturned?
- How do the two sides differ at rest and when smiling? Will you assess my existing asymmetry?
- Can I change the mouth corners while keeping my current lip thickness?
- Why are you recommending lip filler, mouth-corner filler, mouth-corner Botox or a lip flip?
- Do the deep vertical lines beside my mouth need separate treatment?
- Could I try one procedure first? If you recommend both, what is each meant to change?
- What are the product names, actual amounts, VAT-inclusive total and touch-up/follow-up terms?
- When should I plan events and return to work, and whom should I contact for asymmetry or pain?
Mention any previous filler or Botox, including the product, date and discomfort. Bring a reference image and explain shapes you want to avoid. Tell the clinician about blisters or inflammation around the lips before treatment.
Which consultation fits my concern?
If your lips are already full and only the downward corners bother you, have DAO pull assessed during expression and discuss Botox alone.
If mouth-corner movement is satisfactory but the lips are thin or inward-rolling, first decide on the thickness and definition you want from filler. If a lip flip is proposed, ask how it differs.
If the lips are thin and the corners also pull downward, discuss whether to combine the procedures and what each would change. State clearly if you do not want substantially fuller lips.
If shadows beside the mouth corners, deep lines or sagging skin are the main concern, first have the hollows and sagging tissue assessed. Ask whether injections can address the area you want to change.
Conclusion
Decide what you want to keep and change about your lips, then discuss both your resting face and smile. Set the treatment areas, amounts and follow-up timing before deciding between one procedure and combined treatment.
Frequently Asked Questions
Why is mouth-corner Botox used?
It reduces the force of muscles pulling the mouth corners down. If volume loss or skin sagging is the main cause, those issues need separate assessment.
How often should I repeat mouth-corner Botox?
Onlif Clinic advises an average duration of 3–4 months. Repeat timing is decided after examining the return of muscle pull and previous discomfort with expression; a weak perceived result alone is not a reason for frequent additions.
How long does mouth-corner filler last?
It depends on the product, placement and remaining volume. A general lip-filler duration does not tell you how long the mouth-corner angle will remain unchanged; ask when that specific area should be reassessed.
What are the risks of lip filler?
Alongside bruising, swelling, lumps and excessive volume, risks include infection and blocked blood vessels. Severe pain, skin discoloration or vision changes require immediate medical care.
Do I also need filler if my lips are already full?
First have the need for additional volume assessed. If you like the thickness and the concern is muscle pull, discuss Botox alone rather than adding filler simply because it is in a package.
Should I have Botox if my mouth corners do not rise well when smiling?
The decision follows an assessment of which muscles pull and how the two sides move. Existing asymmetry, skin and volume also matter. If the change began after a procedure, contact the treating clinic first.
Will having both make the results last longer?
Repeat treatment is timed separately for each procedure. The clinician examines remaining filler volume and muscle movement to decide.
Should filler or Botox come first?
Whether to have both on the same day or start with one depends on the treatment plan. Ask which areas each will change and when the results will be assessed.
Can I reverse lip filler or Botox immediately if I dislike the result?
Hyaluronic acid filler may be reduced with a dissolving enzyme depending on the findings. Botox has no immediate dissolving treatment; asymmetry and functional discomfort require examination and management.
Sources and verification dates
- DAO anatomy and retrospective clinical study, PMID 351390572022; literature, anatomy and records of 275 patients. Muscle roles and effects on neighboring muscles.
- Randomized comparison of filler, Botox and both, PMID 211340442010; 90 women aged 35–55, 30 per group. Perioral and lower-face outcomes.
- Systematic review of mouth-corner correction2022; 11 studies, 962 patients. Satisfaction and measured elevation.
- Cleveland Clinic lip-filler guideVolume, duration, recovery, reassessment and eating.
- Cleveland Clinic lip-flip guideUpper-lip Botox, limits of reversal and emergency symptoms.
- FDA filler safety guideVascular complications, warning signs and removal risks.
- Onlif Clinic mouth-corner Botox articleJuly 15, 2026; clinic advice on onset, duration and functional discomfort.
- Yeppeunna Clinic before-and-after casePerioral-line filler with Botox for asymmetric mouth corners and the chin. Images dated 2024–2025; individual follow-up interval not stated.
- Repic Clinic Gangnam Main Branch optionsProduct-specific 1 cc filler and mouth-corner Botox, prices before VAT and recovery advice.
- Gangnam Unni mouth-corner Botox reviewsDated excerpts on single/combined treatments and asymmetry.
- Babitalk mouth-corner Botox search resultsExcerpts on lip shape and swelling, with treatment timing where entered.
- Platinum Clinic prices on Gangnam Unni, Dress Plastic Surgery Clinic prices on Gangnam Unni, Babitalk set price, Modoodoc lip-filler prices: Sale configurations and VAT.
Editorial responsibility and relationships
Written by the DermaFocus Editorial Team, without medical review. The clinic case describes that clinic's published course; platform reviews describe different users' experiences. Review text is quoted briefly, without usernames or photographs. We have no advertising, contractual or financial relationship with the clinics mentioned. Individual treatment decisions should be based on an in-person examination.