Treating the Ageing Lip
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Lip Flip: Is It the New Lip Filler?
Lip enhancement is not always about adding volume. Some patients want a subtle improvement in upper-lip show without significantly changing the shape or size of their lips. A lip flip may help selected patients achieve this by changing muscle movement rather than adding product volume.
A lip flip uses botulinum toxin to selectively relax parts of the orbicularis oris muscle. This can reduce the tendency of the upper lip to curl inward during smiling or speech, allowing more of the vermilion to remain visible. The effect can resemble a very subtle enhancement, but it is important to understand that a lip flip does not add true volume and does not replace dermal filler.
Key Takeaways
- A lip flip uses botulinum toxin rather than dermal filler.
- It can reveal more upper-lip vermilion by reducing inward rolling.
- It does not add true volume or provide the same control over shape as filler.
- Patient selection is critical because the orbicularis oris is important for speech, drinking and oral competence.
- Conservative dosing helps preserve function.
- Clear consent should include the possibility of temporary functional changes.
What Is a Lip Flip?
A lip flip is a non-surgical treatment in which small amounts of botulinum toxin are placed around the upper lip. The aim is to reduce selected orbicularis oris activity so the lip turns inward less and sits slightly more outwardly.
Because more of the red lip may become visible, the patient can perceive a subtle increase in lip show. This is sometimes described as a “faux filler” effect, although no volume has actually been added.
Clinical Principle
A lip flip changes muscle behaviour. Dermal filler changes tissue volume, contour and support. The two treatments are not interchangeable.
The Role of the Orbicularis Oris
The orbicularis oris is the main sphincter muscle of the mouth. It contributes to lip closure, speech, eating, drinking, kissing, whistling and facial expression.
In some patients, strong orbicularis oris activity causes the upper lip to roll inward, particularly when smiling. Selective treatment may reduce this inward pull and allow more vermilion to remain visible.
Because the muscle is functionally important, excessive weakening may affect:
- Pursing the lips
- Drinking through a straw
- Speaking clearly
- Singing
- Playing wind instruments
- Maintaining oral competence
- Holding some dentures or removable appliances in position
Who May Be a Suitable Candidate?
A lip flip may suit a patient who already has reasonable lip volume but wants a subtle increase in visible upper-lip show. It may also help when the upper lip curls inward significantly during smiling.
Potential candidates may include patients who:
- Want a subtle result rather than added volume
- Have adequate existing lip structure
- Notice inward rolling of the upper lip during animation
- Understand the possible temporary functional effects
- Have realistic expectations
Important
A lip flip is not a substitute for dermal filler in a patient who needs true volume, structural support, shape refinement or asymmetry correction.
Who May Not Be Suitable?
Some patients rely heavily on precise lip movement for work, communication or dental function. These patients may not be appropriate candidates or may require an especially conservative approach.
- Professional speakers
- Singers
- Wind-instrument musicians
- Patients who rely on strong lip pursing
- Patients wearing dentures or removable appliances that depend on lip support
- Patients with existing oral incompetence or neuromuscular concerns
- Patients seeking substantial lip volume
Dental factors are particularly important. A patient with a temporary anterior plate, denture or removable orthodontic appliance may rely on the orbicularis oris to help stabilise the appliance.
Where Is Botulinum Toxin Placed?
Treatment is generally directed to selected points around the upper lip, with the aim of reducing superficial orbicularis oris activity while preserving essential function.
In some patients, treatment planning may also include assessment of the upper-lip elevator muscles when excessive gingival display is present. This is a separate treatment consideration and should not be assumed to form part of every lip flip.
The treatment plan should be customised according to:
- Lip length and shape
- Orbicularis oris strength
- Smile pattern
- Degree of inward rolling
- Dental support
- Functional demands
- Previous treatment response
Dose: Why Less Is Often More
The source article describes commonly used total doses of four to six units, with higher totals sometimes considered in selected cases. However, botulinum toxin units are not interchangeable between products, and dosing must always be interpreted according to the specific medicine being used.
Higher doses may produce a stronger or longer-lasting effect, but they also increase the risk of unwanted weakness. A conservative first treatment is generally preferable to pursuing maximum longevity.
Clinical Pearl
The goal is not maximum paralysis. The goal is the minimum effective reduction in inward lip pull while preserving speech, drinking, expression and oral competence.
What Results Can Patients Expect?
Early effects may begin within three to four days, with the full outcome becoming clearer at approximately two weeks.
Patients may notice:
- More visible upper-lip vermilion
- Less inward rolling during smiling
- A subtle outward turn of the upper lip
- Mild softening of dynamic upper-lip lines
The change should be subtle. A lip flip will not create the same increase in size, projection or shape control that can be achieved with dermal filler.
Lip Flip vs Lip Filler
| Feature | Lip Flip | Lip Filler |
|---|---|---|
| Primary action | Reduces selected muscle activity | Adds volume and structural support |
| True volume added | No | Yes |
| Shape control | Limited | Greater control over contour and projection |
| Asymmetry correction | Limited | May be improved in selected patients |
| Main risk focus | Functional weakness | Vascular, structural and volume-related complications |
Side Effects and Functional Considerations
Short-term effects may include redness, swelling, bruising and tenderness. Patients may also notice an unusual sensation around the mouth as the muscle effect develops.
Potential functional effects include:
- Difficulty pursing the lips
- Changes when drinking from a cup or straw
- Subtle speech changes
- Reduced control when applying lipstick
- Difficulty playing wind instruments
- Reduced ability to stabilise a denture or removable appliance
- Asymmetry
These possibilities should be discussed clearly before treatment. Even a subtle aesthetic procedure can have temporary functional consequences.
How Long Does a Lip Flip Last?
The source article describes an average duration of approximately three to four months, although this varies between patients. Metabolism, muscle strength, dose, product and individual response all influence longevity.
Patients with high metabolic rates may notice a shorter duration. Increasing the dose purely to prolong the effect is not always appropriate because it may also increase functional impairment.
Consultation and Consent
A careful consultation should explore both the patient’s aesthetic goal and the functional role of their lips.
- Is the patient seeking more visible vermilion or true volume?
- Does the upper lip roll inward during smiling?
- Do they sing, speak professionally or play a wind instrument?
- Do they wear dentures, plates or removable orthodontic appliances?
- Have they previously experienced difficulty with oral competence?
- Do they understand that the result is subtle and temporary?
Consent should include the possibility of asymmetry, temporary functional weakness, speech or drinking changes, bruising, dissatisfaction and the fact that a lip flip cannot deliver the same result as filler.
Common Treatment Planning Mistakes
- Offering a lip flip to a patient who primarily needs volume
- Using excessive dose to pursue longevity
- Ignoring the patient’s profession or functional demands
- Failing to assess dentures or removable dental appliances
- Promising filler-like results
- Treating from a standard map without assessing movement
- Failing to discuss off-label use where relevant
Frequently Asked Questions
Does a lip flip make the lips bigger?
It does not add true volume. It may make more of the upper-lip vermilion visible by reducing inward rolling.
Can a lip flip replace lip filler?
No. A lip flip changes muscle activity, while filler can add volume, improve projection, alter contour and address some asymmetries.
How quickly does a lip flip work?
Early effects may begin within several days, with the full result generally assessed at around two weeks.
How long does it last?
The effect commonly lasts around three to four months, although individual response varies.
Can a lip flip affect speech or drinking?
Yes. Because the orbicularis oris contributes to lip closure and pursing, treatment can temporarily affect speech, drinking, whistling or oral competence.
Who may not be suitable?
Patients who rely heavily on precise lip movement, use removable dental appliances requiring lip support or seek substantial volume may not be appropriate candidates.
Quick Summary
- A lip flip uses botulinum toxin to reduce inward upper-lip curling.
- It may reveal more vermilion but does not add true volume.
- It does not replace dermal filler.
- Patient selection and functional assessment are essential.
- Conservative dosing helps preserve speech, drinking and oral competence.
Develop a Safer, More Individualised Lip Treatment Plan
Lip treatment should never begin with a default technique. Practitioners must first determine whether the patient’s concern relates to muscle activity, volume, shape, asymmetry, dental support or a combination of factors.
Dermal Distinction Academy provides anatomy-led cosmetic injectable education for AHPRA-registered practitioners, with practical training in lip assessment, botulinum toxin, dermal filler, patient selection and complication prevention.
